CVE-2025-23134 (GCVE-0-2025-23134)
Vulnerability from cvelistv5
Published
2025-04-16 14:13
Modified
2025-10-01 16:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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)(&register_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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0dPatch
Impacted products
Vendor Product Version
Linux Linux Version: 3923de04c81733b30b8ed667569632272fdfed9a
Version: 3923de04c81733b30b8ed667569632272fdfed9a
Version: 3923de04c81733b30b8ed667569632272fdfed9a
Version: 3923de04c81733b30b8ed667569632272fdfed9a
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   Linux Linux Version: 6.9
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