CVE-2025-23134 - ALSA Timer Mutex Deadlock Vulnerability

CVE-2025-23134 - ALSA Timer Mutex Deadlock Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Wed, 04/16/2025 - 20:36
CVE ID : CVE-2025-23134
Published : April 16, 2025, 3:16 p.m. | 2 hours, 5 minutes ago
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)(&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.
Severity: 0.0 | NA
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