CVE-2023-52672: pipe: wakeup wr_wait after setting max_usage
First published: Fri May 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: pipe: wakeup wr_wait after setting max_usage Commit c73be61cede5 ("pipe: Add general notification queue support") a regression was introduced that would lock up resized pipes under certain conditions. See the reproducer in [1]. The commit resizing the pipe ring size was moved to a different function, doing that moved the wakeup for pipe->wr_wait before actually raising pipe->max_usage. If a pipe was full before the resize occured it would result in the wakeup never actually triggering pipe_write. Set @max_usage and @nr_accounted before waking writers if this isn't a watch queue. [Christian Brauner <brauner@kernel.org>: rewrite to account for watch queues]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.10-1 6.12.11-1 |
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Reference Links
- https://git.kernel.org/stable/c/162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8
- https://git.kernel.org/stable/c/3efbd114b91525bb095b8ae046382197d92126b9
- https://git.kernel.org/stable/c/68e51bdb1194f11d3452525b99c98aff6f837b24
- https://git.kernel.org/stable/c/6fb70694f8d1ac34e45246b0ac988f025e1e5b55
- https://git.kernel.org/stable/c/b87a1229d8668fbc78ebd9ca0fc797a76001c60f
- https://git.kernel.org/stable/c/e95aada4cb93d42e25c30a0ef9eb2923d9711d4a
- https://launchpad.net/bugs/cve/CVE-2023-52672
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52672
- https://nvd.nist.gov/vuln/detail/CVE-2023-52672
- https://security-tracker.debian.org/tracker/CVE-2023-52672
- https://ubuntu.com/security/CVE-2023-52672
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://git.kernel.org/linus/e95aada4cb93d42e25c30a0ef9eb2923d9711d4a
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