What is the severity of CVE-2025-23134?

CVE-2025-23134 is classified as a moderate severity vulnerability due to the potential for deadlocks in the Linux kernel.

How do I fix CVE-2025-23134?

To fix CVE-2025-23134, ensure you update to the latest patched version of the Linux kernel provided by your distribution.

What systems are affected by CVE-2025-23134?

CVE-2025-23134 affects various versions of the Linux kernel that implement ALSA timer functions.

What type of vulnerability is CVE-2025-23134?

CVE-2025-23134 is a concurrency-related vulnerability that can lead to deadlocks during user data transfers.

Is CVE-2025-23134 being actively exploited?

As of now, there have been no reports indicating that CVE-2025-23134 is actively being exploited in the wild.

Vulnerability/
CVE-2025-23134

16/4/2025

17/4/2025

CVE-2025-23134: ALSA: timer: Don't take register_mutex with copy_from/to_user()

First published: Wed Apr 16 2025(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel

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Frequently Asked Questions

What is the severity of CVE-2025-23134?
CVE-2025-23134 is classified as a moderate severity vulnerability due to the potential for deadlocks in the Linux kernel.
How do I fix CVE-2025-23134?
To fix CVE-2025-23134, ensure you update to the latest patched version of the Linux kernel provided by your distribution.
What systems are affected by CVE-2025-23134?
CVE-2025-23134 affects various versions of the Linux kernel that implement ALSA timer functions.
What type of vulnerability is CVE-2025-23134?
CVE-2025-23134 is a concurrency-related vulnerability that can lead to deadlocks during user data transfers.
Is CVE-2025-23134 being actively exploited?
As of now, there have been no reports indicating that CVE-2025-23134 is actively being exploited in the wild.

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