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CVE-2026-50261

Опубликовано: 05 июн. 2026
Источник: nvd
CVSS3: 7.8
EPSS Низкий

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.

Уязвимые конфигурации

Конфигурация 1

Одно из

cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
Версия до 21.1.23 (исключая)
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*
Версия до 24.1.12 (исключая)
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

EPSS

Процентиль: 5%
0.00154
Низкий

7.8 High

CVSS3

Дефекты

CWE-416
CWE-416

Связанные уязвимости

CVSS3: 7.8
ubuntu
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
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
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.

EPSS

Процентиль: 5%
0.00154
Низкий

7.8 High

CVSS3

Дефекты

CWE-416
CWE-416