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CVE-2024-56532

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-…

Published Dec 27, 2024CWE-667EPSS 0.22%

Overview

CVE-2024-56532 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: us122l: Use snd_card_free_when_closed() at disconnection

The USB disconnect callback is supposed to be short and not too-long

waiting. OTOH, the current code uses snd_card_free() at

disconnection, but this waits for the close of all used fds, hence it

can take long. It eventually blocks the upper layer USB ioctls, which

may trigger a soft lockup.

An easy workaround is to replace snd_card_free() with

snd_card_free_when_closed(). This variant returns immediately while

the release of resources is done asynchronously by the card device

release at the last close.

The loop of us122l->mmap_count check is dropped as well. The check is

useless for the asynchronous operation with *_when_closed().

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7Refgit.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390Refgit.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6Refgit.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9Refgit.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597Refgit.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38Refgit.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947Refgit.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16Refgit.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154Reflists.debian.org/debian-lts-announce/2025/03/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56532?

CVE-2024-56532 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56532?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56532?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-56532?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56532 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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