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CVE-2026-23270

Опубликовано: 19 мар. 2026
Источник: ubuntu
Приоритет: medium
EPSS Низкий

Описание

In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/ [2] ...

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jammy

DNE

noble

DNE

questing

DNE

upstream

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РелизСтатусПримечание
devel

DNE

esm-infra/bionic

needs-triage

jammy

DNE

noble

DNE

questing

DNE

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devel

DNE

jammy

needs-triage

noble

DNE

questing

DNE

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needs-triage

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devel

DNE

esm-infra/focal

ignored

end of kernel support
jammy

DNE

noble

DNE

questing

DNE

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ignored

end of life

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РелизСтатусПримечание
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DNE

jammy

ignored

superseded by Ubuntu Pro ppa version
noble

DNE

questing

DNE

realtime/jammy

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DNE

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DNE

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DNE

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DNE

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DNE

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jammy

DNE

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DNE

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needs-triage

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DNE

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DNE

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needs-triage

noble

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DNE

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DNE

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DNE

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ignored

superseded by linux-lowlatency-hwe-6.2
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superseded by linux-lowlatency-hwe-6.2

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replaced by linux-hwe-6.14
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replaced by linux-hwe-6.14

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superseded by linux-lowlatency-hwe-6.5
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superseded by linux-lowlatency-hwe-6.5

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superseded by linux-lowlatency-hwe-6.8
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superseded by linux-lowlatency-hwe-6.8

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devel

DNE

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needs-triage

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DNE

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DNE

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devel

DNE

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needs-triage

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questing

DNE

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devel

DNE

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DNE

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ignored

end of kernel support
questing

DNE

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end of kernel support

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DNE

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ignored

superseded by linux-nvidia-6.5
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superseded by linux-nvidia-6.5

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ignored

superseded by linux-nvidia-6.8
noble

DNE

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superseded by linux-nvidia-6.8

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devel

DNE

jammy

needs-triage

noble

DNE

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DNE

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devel

DNE

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DNE

noble

needs-triage

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DNE

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devel

DNE

jammy

needs-triage

noble

needs-triage

questing

DNE

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devel

DNE

esm-infra/focal

needs-triage

jammy

DNE

noble

DNE

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DNE

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РелизСтатусПримечание
devel

DNE

jammy

needs-triage

noble

DNE

questing

DNE

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devel

DNE

esm-infra/bionic

ignored

replaced by linux-hwe-5.4
jammy

DNE

noble

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end of life

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devel

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ignored

superseded by linux-oem-5.13
jammy

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superseded by linux-oem-5.13

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ignored

superseded by linux-oem-5.14
jammy

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superseded by linux-oem-5.14

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esm-infra/focal

ignored

replaced by linux-hwe-5.15
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replaced by linux-hwe-5.15

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ignored

superseded by linux-oem-6.1
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DNE

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superseded by linux-oem-6.1

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ignored

superseded by linux-oem-5.10
jammy

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superseded by linux-oem-5.10

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devel

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ignored

superseded by linux-oem-6.1
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DNE

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superseded by linux-oem-6.1

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devel

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ignored

superseded by linux-oem-6.5
noble

DNE

questing

DNE

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superseded by linux-oem-6.5

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devel

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DNE

noble

ignored

superseded by linux-oem-6.14
questing

DNE

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superseded by linux-oem-6.14

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devel

DNE

jammy

DNE

noble

needs-triage

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DNE

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devel

DNE

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DNE

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needs-triage

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DNE

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ignored

superseded by linux-oem-6.8
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superseded by linux-oem-6.8

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superseded by linux-oem-6.14
questing

DNE

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superseded by linux-oem-6.14

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devel

needs-triage

esm-infra/bionic

needs-triage

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needs-triage

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ignored

superseded by linux-oracle-5.3
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superseded by linux-oracle-5.3

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ignored

superseded by linux-oracle-5.13
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superseded by linux-oracle-5.13

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ignored

superseded by linux-oracle-5.15
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DNE

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superseded by linux-oracle-5.15

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devel

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needs-triage

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DNE

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DNE

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ignored

superseded by linux-oracle-5.4
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DNE

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superseded by linux-oracle-5.4

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needs-triage

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DNE

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DNE

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ignored

superseded by linux-oracle-5.11
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DNE

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DNE

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ignored

superseded by linux-oracle-5.11

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devel

DNE

jammy

DNE

noble

needs-triage

questing

DNE

upstream

needs-triage

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РелизСтатусПримечание
devel

DNE

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DNE

noble

needs-triage

questing

DNE

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devel

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jammy

ignored

superseded by linux-oracle-6.8
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DNE

questing

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superseded by linux-oracle-6.8

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РелизСтатусПримечание
devel

DNE

jammy

needs-triage

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DNE

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DNE

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РелизСтатусПримечание
devel

needs-triage

esm-infra/focal

needs-triage

jammy

needs-triage

noble

needs-triage

questing

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РелизСтатусПримечание
devel

DNE

esm-infra/bionic

needs-triage

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DNE

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DNE

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DNE

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devel

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ignored

superseded by Ubuntu Pro ppa version
questing

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realtime/noble

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ignored

replaced by linux-raspi
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DNE

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РелизСтатусПримечание
devel

needs-triage

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ignored

superseded by Ubuntu Pro ppa version
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ignored

superseded by Ubuntu Pro ppa version
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needs-triage

realtime/jammy

needs-triage

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РелизСтатусПримечание
devel

DNE

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DNE

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DNE

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DNE

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esm-infra/focal

ignored

superseded by linux-riscv-5.8
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ignored

end of kernel support
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replaced by linux-riscv-6.14
questing

needs-triage

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РелизСтатусПримечание
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ignored

superseded by linux-riscv-5.13
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superseded by linux-riscv-5.13

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DNE

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ignored

end of kernel support
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ignored

end of life

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ignored

superseded by linux-riscv-5.11
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superseded by linux-riscv-6.17
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superseded by linux-riscv-6.17

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ignored

superseded by linux-riscv-6.8
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superseded by linux-riscv-6.8

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needs-triage

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ignored

end of kernel support
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questing

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ignored

end of life

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РелизСтатусПримечание
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ignored

superseded by linux-starfive-6.5
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questing

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superseded by linux-starfive-6.5

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РелизСтатусПримечание
devel

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ignored

end of kernel support
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questing

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ignored

end of life

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РелизСтатусПримечание
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devel

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EPSS

Процентиль: 9%
0.00032
Низкий

Связанные уязвимости

CVSS3: 7
redhat
11 дней назад

No description is available for this CVE.

nvd
11 дней назад

In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/ [2

debian
11 дней назад

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

github
10 дней назад

In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/...

EPSS

Процентиль: 9%
0.00032
Низкий
Уязвимость CVE-2026-23270