CVE-2022-49737: Race Condition
First published: Tue Sep 10 2024(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xorg-server | <=2:21.1.13-2<=2:21.1.7-3+deb12u7 | |
| X.Org Xserver | >=20.11<=21.1.16 |
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Reference Links
- 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://news.ycombinator.com/item?id=37280878
- https://popey.com/blog/2023/08/i386-in-ubuntu-wont-die/
- https://packages.ubuntu.com/search?keywords=xserver-xorg-core&searchon=names&suite=jammy§ion=all
- https://gitlab.freedesktop.org/xorg
- https://gitlab.freedesktop.org/xorg/xserver
- https://www.debian.org/support
- http://wiki.x.org
- https://wayland.freedesktop.org/libinput/doc/1.22.1/absolute_coordinate_ranges.html
Frequently Asked Questions
What is the severity of CVE-2022-49737?
CVE-2022-49737 has been classified as a medium-severity vulnerability due to the potential for a race condition affecting data integrity in the X.Org X server.
How do I fix CVE-2022-49737?
To fix CVE-2022-49737, it is recommended to update to the latest version of the X.Org X server beyond 21.1.16 where the issue is addressed.
What systems are affected by CVE-2022-49737?
CVE-2022-49737 affects X.Org X server versions from 20.11 through 21.1.16.
What type of vulnerability is CVE-2022-49737?
CVE-2022-49737 is a race condition vulnerability that can lead to improper handling of data structures in the X server.
What impact does CVE-2022-49737 have on users?
The impact of CVE-2022-49737 could allow unauthorized access to shared resources, potentially leading to system instability or security breaches.
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