CVE-2024-56532 Affecting kernel-azure package, versions <6.4.0-150600.8.26.1


Severity

Recommended
0.0
low
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

Exploit Maturity
Not Defined
EPSS
0.04% (16th percentile)

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  • Snyk IDSNYK-SLES156-KERNELAZURE-8716238
  • published12 Feb 2025
  • disclosed11 Feb 2025

Introduced: 11 Feb 2025

NewCVE-2024-56532  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-azure to version 6.4.0-150600.8.26.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-azure package and not the kernel-azure package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

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().

CVSS Scores

version 3.1