CVE-2026-68384

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/vf: Fix VF CCS attach/detach race with in-flight BO moves

xe_bo_move() attaches VF CCS read/write batch buffers (BBs) to a BO

after it transitions NULL/SYSTEM -> TT, and detaches them after it

transitions TT -> SYSTEM. Both operations were done synchronously on

the CPU immediately after building the move's copy/clear fence,

without waiting for that fence to signal. This creates two races with

VF migration:

- Attach happens too late relative to the copy job it is meant to

protect. If the copy job is submitted before the CCS BBs are

attached, a VF migration event that pauses execution mid-copy can

observe partially copied CCS metadata without the attach state

needed to correctly save/restore it.

- Detach happens too early relative to the copy job that moves data

out of TT. The CCS BBs are torn down right after the copy fence is

obtained, while the actual blit may still be in flight. A VF

migratio

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References