SB2026102669 - Missing Synchronization in Linux kernel amd amdgpu driver

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Main Vulnerability Database SB2026102669

SB2026102669 - Missing Synchronization in Linux kernel amd amdgpu driver

Published: October 26, 2026

Security Bulletin ID SB2026102669
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Missing Synchronization (CVE-ID: CVE-2026-99090)

CWE-ID: CWE-820 - Missing Synchronization

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a kernel warning and set the TAINT_WARN flag during GPU recovery on systems with lockdep enabled.

The vulnerability exists due to missing synchronization in the amdgpu_get_vblank_counter_kms() callback when reading display registers and scanout position during GPU reset. A local user can cause vblank counter reads to overlap GPU recovery to trigger the lockdep assertion in amdgpu_device_skip_hw_access() and set TAINT_WARN when lockdep is enabled.


Remediation

Install update from vendor's website.

References