CVE-2022-49288: ALSA: pcm: Fix races among concurrent prealloc proc writes
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the PCM open_mutex to the proc write operation for avoiding the racy proc writes and the PCM stream open (and further operations).
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | <4.14.279 | |
| Linux Kernel | >=4.15<4.19.243 | |
| Linux Kernel | >=4.20<5.4.193 | |
| Linux Kernel | >=5.5<5.10.109 | |
| Linux Kernel | >=5.11<5.15.32 | |
| Linux Kernel | >=5.16<5.16.18 | |
| Linux Kernel | >=5.17<5.17.1 |
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Reference Links
- https://git.kernel.org/stable/c/e7786c445bb67a9a6e64f66ebd6b7215b153ff7d
- https://git.kernel.org/stable/c/e14dca613e0a6ddc2bf6e360f16936a9f865205b
- https://git.kernel.org/stable/c/37b12c16beb6f6c1c3c678c1aacbc46525c250f7
- https://git.kernel.org/stable/c/b560d670c87d7d40b3cf6949246fa4c7aa65a00a
- https://git.kernel.org/stable/c/51fce708ab8986a9879ee5da946a2cc120f1036d
- https://git.kernel.org/stable/c/a21d2f323b5a978dedf9ff1d50f101f85e39b3f2
- https://git.kernel.org/stable/c/5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6
- https://git.kernel.org/stable/c/69534c48ba8ce552ce383b3dfdb271ffe51820c3
Frequently Asked Questions
What is the severity of CVE-2022-49288?
CVE-2022-49288 has been classified as a medium severity vulnerability.
How do I fix CVE-2022-49288?
To remediate CVE-2022-49288, you should update your Linux kernel to a version that includes the patch addressing this vulnerability.
What versions of Linux Kernel are affected by CVE-2022-49288?
CVE-2022-49288 affects various versions of the Linux Kernel between 4.15 and 5.17.1.
What type of attack does CVE-2022-49288 enable?
CVE-2022-49288 may lead to Use-After-Free (UAF) scenarios due to race conditions in concurrent PCM buffer preallocation.
Is CVE-2022-49288 specific to any Linux distribution?
CVE-2022-49288 is relevant to all distributions using affected versions of the Linux kernel.
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