SB20260824170 - Race condition in Linux kernel drm v3d driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-74638)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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 user to cause a denial of service.

The vulnerability exists due to a race condition in the v3d drm scheduler timeout handling for V3D hardware queues when handling concurrent scheduler timeouts across queues that share a global reset. A local user can trigger queue timeouts during gpu workload execution to cause a denial of service.

The issue can leave the CL queue credit count inconsistent, resulting in a complete GPU hang and UI freeze.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4da94744707b27a3ae1197bdd7127da4505dc5b1
• https://git.kernel.org/stable/c/5884851a096d8afcdf91f0e542bac193035183a6
• https://git.kernel.org/stable/c/c22a45817b9c92aa0391db60e2ed467c7e6027d7