CVE-2022-49737 Information

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.

Reference

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