CVE-2022-49737

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-16 · updated 2026-06-17
Weakness: CWE-413

Description

In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for mouse gestures, the main thread modifies various data structures used by the input thread without acquiring a lock, aka a race condition. In particular, AttachDevice in dix/devices.c does not acquire an input lock.

Affected products

xorg-x11-server: from 20.11 through 21.1.16

References

https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=1081338;filename=dix-Hold-input-lock-for-AttachDevice.patch;msg=5
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081338
https://gitlab.freedesktop.org/xorg/xserver/-/commit/dc7cb45482cea6ccec22d117ca0b489500b4d0a0
https://gitlab.freedesktop.org/xorg/xserver/-/issues/1260
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081338

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