SB2026050874 - Use-after-free in Linux kernel soc

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Main Vulnerability Database SB2026050874

SB2026050874 - Use-after-free in Linux kernel soc

Published: May 8, 2026

Security Bulletin ID SB2026050874
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-43459)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in snd_soc_dapm_stream_event() when handling delayed work during sound card unbind while a PCM stream is open. A local user can trigger a sound card unbind in this state to cause a denial of service.

The issue occurs because a PCM close path can schedule new delayed work after the earlier workqueue flush and before DAPM widgets are removed.


Remediation

Install update from vendor's website.

References