CVE-2024-56531

Published Dec 27, 2024

Last updated 7 months ago

CVSS medium 5.5

Overview

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: 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. This patch also splits the code to the disconnect and the free phases; the former is called immediately at the USB disconnect callback while the latter is called from the card destructor.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Modified
Products
linux_kernel

Risk scores

CVSS 3.1

Type
Primary
Base score
5.5
Impact score
3.6
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

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

Social media

Hype score
Not currently trending

  1. CVE-2024-56531 Linux Kernel Fix ALSA USB Disconnect Soft Lockup Prevention: In the Linux kernel, a vulnerability has been fixed. It involves the ALSA: caiaq section. The issue happened during USB disconnection. T... https://t.co/5FlFZrdlpm

    @VulmonFeeds

    27 Dec 2024

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  2. CVE-2024-56531 In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is sup… https://t.co/GTFsl3j6Kr

    @CVEnew

    27 Dec 2024

    263 Impressions

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Configurations

Related CVEs

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References

Sources include official advisories and independent security research.