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CVE-2026-50261

Опубликовано: 05 июн. 2026
Источник: ubuntu
Приоритет: medium
CVSS3: 7.8

Описание

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.

РелизСтатусПримечание
devel

not-affected

code not present
esm-infra-legacy/xenial

not-affected

code not present
esm-infra/bionic

not-affected

code not present
esm-infra/focal

not-affected

code not present
jammy

not-affected

code not present
noble

not-affected

code not present
questing

not-affected

code not present
resolute

not-affected

code not present
upstream

not-affected

Показывать по

РелизСтатусПримечание
devel

DNE

esm-infra-legacy/xenial

not-affected

code not present
jammy

DNE

noble

DNE

questing

DNE

resolute

DNE

upstream

not-affected

Показывать по

РелизСтатусПримечание
devel

DNE

esm-infra/bionic

not-affected

code not present
jammy

DNE

noble

DNE

questing

DNE

resolute

DNE

upstream

not-affected

Показывать по

РелизСтатусПримечание
devel

needs-triage

esm-infra-legacy/trusty

needs-triage

esm-infra-legacy/xenial

needs-triage

esm-infra/bionic

needs-triage

esm-infra/focal

needs-triage

jammy

needs-triage

noble

needs-triage

questing

ignored

end of life, was needs-triage
resolute

needs-triage

upstream

needs-triage

Показывать по

РелизСтатусПримечание
devel

DNE

esm-infra-legacy/xenial

needs-triage

jammy

DNE

noble

DNE

questing

DNE

resolute

DNE

upstream

needs-triage

Показывать по

РелизСтатусПримечание
devel

DNE

esm-infra/bionic

needs-triage

jammy

DNE

noble

DNE

questing

DNE

resolute

DNE

upstream

needs-triage

Показывать по

РелизСтатусПримечание
devel

needs-triage

jammy

needs-triage

noble

needs-triage

questing

ignored

end of life, was needs-triage
resolute

needs-triage

upstream

released

2:24.1.12-1

Показывать по

7.8 High

CVSS3

Связанные уязвимости

CVSS3: 7.8
redhat
2 месяца назад

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.

CVSS3: 7.8
nvd
около 2 месяцев назад

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.

CVSS3: 7.8
msrc
около 2 месяцев назад

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

CVSS3: 7.8
debian
около 2 месяцев назад

A use-after-free flaw was found in the X.Org X server and Xwayland in ...

CVSS3: 7.8
github
около 2 месяцев назад

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.

7.8 High

CVSS3