SB20260812143 - Race condition in Linux kernel drm xe driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-68384)

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

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 xe_bo_move() and VF CCS attach and detach handling when processing buffer object moves during VF migration. A local user can trigger a VF migration event while a copy job is in flight to cause a denial of service.

The issue affects virtual function CCS state handling during transitions between SYSTEM and TT memory, including cases where execution is paused mid-copy.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/35ba43b541117bfb595e4b807ba447cf4335cc7d
• https://git.kernel.org/stable/c/56441f9e08ad68697295b8835266d2bc48ab59b5
• https://git.kernel.org/stable/c/f2ebfd5cc87f1393a30c8b8b0a6c20cb22cffa97