VULNERABILITY INTELLIGENCE

CVE-2025-23134

CVSS score5.5 MEDIUM
EPSS probability0.15%
CISA KEVNot currently listed
Published2025-04-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-667
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-667

Primary references