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CVE-2025-37797

Опубликовано: 02 мая 2025
Источник: ubuntu
Приоритет: medium
EPSS Низкий

Описание

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

not-affected

6.15.0-3.3
esm-infra-legacy/trusty

not-affected

3.13.0-173.224
esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

not-affected

4.4.0-22.39
focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-144.157
noble

needed

oracular

needed

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

end of kernel support
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

not-affected

6.14.0-1007.7+25.10.2
esm-infra-legacy/trusty

not-affected

4.4.0-1054.58
esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

not-affected

4.4.0-1001.10
focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-1088.95
noble

needed

oracular

needed

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-aws-5.3
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-aws-5.13
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-aws-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-aws-5.15
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-aws-5.15]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

pending

5.15.0-1088.95~20.04.1
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-aws-6.2
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-aws-5.4
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-aws-5.11
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-aws-5.11]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-aws-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-aws-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

fips-preview/jammy

needed

fips-updates/bionic

needed

fips-updates/focal

needed

fips-updates/jammy

pending

5.15.0-1088.95+fips1
fips-updates/xenial

DNE

fips/bionic

needed

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

ignored

ESM criteria, was needed
focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

not-affected

6.14.0-1007.7+25.10.1
esm-infra-legacy/trusty

ignored

ESM criteria, was needed
esm-infra/bionic

ignored

superseded by linux-azure-5.3
esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

ignored

ESM criteria, was needed
focal

ignored

end of standard support, was needed
jammy

needed

noble

needed

oracular

needed

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-azure-5.13
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-azure-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-azure-5.15
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-azure-5.15]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-azure-6.2
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-azure-5.4
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-azure-5.11
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-azure-5.11]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

ignored

end of life, was needed
oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-azure-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-azure-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-azure-5.3
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-azure-fde-5.15
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-azure-fde-5.15]
jammy

needed

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

not-affected

5.15.0-1019.24~20.04.1.1
esm-infra/xenial

DNE

focal

not-affected

5.15.0-1019.24~20.04.1.1
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-azure-fde-6.2
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

replaced by linux-azure-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

fips-preview/jammy

needed

fips-updates/bionic

needed

fips-updates/focal

needed

fips-updates/jammy

needed

fips-updates/xenial

DNE

fips/bionic

needed

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

bluefield/jammy

needed

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

fips-preview/jammy

needed

fips-updates/bionic

needed

fips-updates/focal

needed

fips-updates/jammy

pending

5.15.0-144.157+fips1
fips-updates/xenial

not-affected

4.4.0-1003.3
fips/bionic

needed

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

not-affected

6.14.0-1009.9+25.10.1
esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-gcp-5.3
esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

ignored

ESM criteria, was needed
focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-1087.96
noble

needed

oracular

needed

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-gcp-5.13
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-gcp-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-gcp-5.15
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-gcp-5.15]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-gcp-6.2
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-gcp-5.4
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-gcp-5.11
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-gcp-5.11]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

ignored

end of life, was needed
oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-gcp-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-gcp-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

fips-preview/jammy

needed

fips-updates/bionic

needed

fips-updates/focal

needed

fips-updates/jammy

pending

5.15.0-1087.96+fips1
fips-updates/xenial

DNE

fips/bionic

needed

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

end of kernel support
focal

ignored

end of kernel support
jammy

pending

5.15.0-1085.91
noble

needed

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-gke-5.0
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

end of kernel support
esm-infra/xenial

DNE

focal

ignored

end of kernel support
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

end of kernel support
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

end of kernel support
focal

ignored

end of kernel support
jammy

pending

5.15.0-1070.78
noble

needed

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

ignored

end of kernel support
esm-infra/xenial

DNE

focal

ignored

end of kernel support
jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

end of kernel support
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

replaced by linux-hwe-5.4
esm-infra/focal

DNE

esm-infra/xenial

ignored

ESM criteria, was needed
focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-hwe-5.13
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-hwe-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-hwe-5.15
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-hwe-5.15]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

pending

5.15.0-144.157~20.04.1
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-hwe-6.2
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-hwe-5.11
focal

ignored

end of standard support, was ignored [superseded by linux-hwe-5.11]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

ignored

end of life, was needed
oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-hwe-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-hwe-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-hwe-5.4
esm-infra/focal

DNE

esm-infra/xenial

ignored

superseded by linux-hwe
focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-1080.83
noble

needed

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

end of kernel support
focal

ignored

end of kernel support
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra/focal

DNE

focal

DNE

jammy

ignored

superseded by Ubuntu Pro ppa version
noble

DNE

oracular

DNE

plucky

DNE

realtime/jammy

needed

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

pending

5.15.0-1083.89
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

not-affected

4.4.0-1007.12
focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-1084.89
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

pending

5.15.0-144.157
noble

needed

oracular

needed

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

pending

5.15.0-144.157~20.04.1
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-lowlatency-hwe-6.2
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

ignored

end of life, was needed
oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-lowlatency-hwe-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-lowlatency-hwe-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

not-affected

4.4.0-164.192~14.04.1
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

not-affected

4.4.0-13.29~14.04.1

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

pending

5.15.0-1082.83
noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-nvidia-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-nvidia-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

replaced by linux-hwe-5.4
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-oem-5.13
focal

ignored

end of standard support, was ignored [superseded by linux-oem-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-oem-5.14
focal

ignored

end of standard support, was ignored [superseded by linux-oem-5.14]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

replaced by linux-hwe-5.15
focal

ignored

end of standard support, was ignored [replaced by linux-hwe-5.15]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-oem-6.1
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-oem-5.10
focal

ignored

end of standard support, was ignored [superseded by linux-oem-5.10]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-oem-6.1
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-oem-6.5
noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

not-affected

6.14.0-1005.5
oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-oem-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

needed

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

not-affected

6.14.0-1007.7+25.10.1
esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

ignored

ESM criteria, was needed
focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-1085.91
noble

needed

oracular

needed

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-oracle-5.3
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-oracle-5.13
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-oracle-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-oracle-5.15
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-oracle-5.15]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

superseded by linux-oracle-5.4
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-oracle-5.11
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-oracle-5.11]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-oracle-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

needed

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
focal

ignored

end of standard support, was needed
jammy

pending

5.15.0-1081.84
noble

needed

oracular

needed

plucky

released

6.14.0-1007.7
trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needed
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

ESM criteria, was needed
esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra/focal

DNE

focal

DNE

jammy

DNE

noble

ignored

superseded by Ubuntu Pro ppa version
oracular

DNE

plucky

DNE

realtime/noble

needed

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support
devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

replaced by linux-raspi
focal

ignored

end of standard support, was ignored [replaced by linux-raspi]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

needed

esm-infra/focal

DNE

focal

DNE

jammy

ignored

superseded by Ubuntu Pro ppa version
noble

ignored

superseded by Ubuntu Pro ppa version
oracular

needed

plucky

released

6.14.0-1004.4
realtime/jammy

needed

realtime/noble

needed

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

needed

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-riscv-5.8
focal

ignored

end of standard support, was ignored [superseded by linux-riscv-5.8]
jammy

ignored

end of kernel support
noble

ignored

replaced by linux-riscv-6.14, was needed
oracular

needed

plucky

released

6.14.0-22.22.1
trusty

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-riscv-5.13
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-riscv-5.13]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

pending

5.15.0-1083.87~20.04.1
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

end of kernel support
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

superseded by linux-riscv-5.11
esm-infra/xenial

DNE

focal

ignored

end of standard support, was ignored [superseded by linux-riscv-5.11]
jammy

DNE

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

DNE

noble

not-affected

6.14.0-22.22.1~24.04.1
oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-riscv-6.8
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

needed

noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

end of kernel support
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

superseded by linux-starfive-6.5
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/bionic

DNE

esm-infra/focal

DNE

esm-infra/xenial

DNE

focal

DNE

jammy

ignored

end of kernel support
noble

DNE

oracular

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

ESM criteria, was needed
esm-infra/xenial

DNE

focal

ignored

end of standard support, was needed
jammy

needed

noble

DNE

oracular

DNE

plucky

DNE

Показывать по

EPSS

Процентиль: 17%
0.00053
Низкий

Связанные уязвимости

CVSS3: 7
redhat
3 месяца назад

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

nvd
3 месяца назад

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

debian
3 месяца назад

In the Linux kernel, the following vulnerability has been resolved: n ...

github
3 месяца назад

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

suse-cvrf
около 1 месяца назад

Security update for the Linux Kernel

EPSS

Процентиль: 17%
0.00053
Низкий