CVE-2025-23134

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771	Patch
https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862	Patch
https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6	Patch
https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0d	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-04-16 15:16

Updated : 2025-10-01 17:15

NVD link : CVE-2025-23134

Mitre link : CVE-2025-23134

CVE.ORG link : CVE-2025-23134

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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