Main Vulnerability Database Vulnerabilities #VU157703

Missing Synchronization in Linux kernel - CVE-2026-99090

Published: October 26, 2026

Vulnerability identifier: #VU157703

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-99090

CWE-ID: CWE-820

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

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.

Affected software

Linux kernel

How to mitigate CVE-2026-99090

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3

External References

Related Security Bulletins