Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Don't take register_mutex with copy_from/to_user() The infamous mmap_lock taken in copy_from/to_user() can be often problematic when it's called inside another mutex, as they might lead to deadlocks. In the case of ALSA timer code, the bad pattern is with guard(mutex)(®ister_mutex) that covers copy_from/to_user() -- which was mistakenly introduced at converting to guard(), and it had been carefully worked around in the past. This patch fixes those pieces simply by moving copy_from/to_user() out of the register mutex lock again.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.9, < 6.12.23 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771Patch
- https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862Patch
- https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6Patch
- https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0dPatch
FAQ
What is CVE-2025-23134?
CVE-2025-23134 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Don't take register_mutex with copy_from/to_user() The infamous mmap_lock taken in copy_from/to_user() can be often p...
How severe is CVE-2025-23134?
CVE-2025-23134 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-23134?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.