SB20260815149 - Deadlock in Linux kernel base firmware_loader driver

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Main Vulnerability Database SB20260815149

SB20260815149 - Deadlock in Linux kernel base firmware_loader driver

Published: August 15, 2026

Security Bulletin ID SB20260815149
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) Deadlock (CVE-ID: CVE-2026-74331)

CWE-ID: CWE-833 - Deadlock

CVSSv4: 6.8 [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]


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

The vulnerability exists due to a recursive locking deadlock in firmware_loader power management notification handling when preparing for system suspend or hibernation and caching firmware images. A local attacker can trigger an out-of-memory condition that causes synchronous execution of firmware caching work to cause a denial of service.

The issue occurs when asynchronous work scheduling falls back to synchronous execution after memory allocation for the work entry fails.


Remediation

Install update from vendor's website.

References