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CVE-2026-50257

Опубликовано: 09 июн. 2026
Источник: msrc
CVSS3: 6.6
EPSS Низкий

Описание

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

EPSS

Процентиль: 4%
0.00142
Низкий

6.6 Medium

CVSS3

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 miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. 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 miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. 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 miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.

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 miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.

EPSS

Процентиль: 4%
0.00142
Низкий

6.6 Medium

CVSS3