CVE-2026-53201
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile — higher than 3% of all known CVEs
Summary
In the Linux kernel, an optimization that skipped exec queue schedule toggle during suspend was reverted because it bypassed GuC suspend, preventing context switch TLB flush for invalidated userptr VMAs. This caused page faults in userptr invalidation tests in LR/preempt-fence VM mode.
Risk Assessment
The organization may face system instability, page faults, and potential memory isolation violations during suspend/resume operations, especially in environments using LR/preempt-fence VM mode.
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit 6a1e7934d9a6cf46aecae00a99c2603d1295e170) or later to restore proper exec queue schedule toggling during suspend.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: Revert "drm/xe: Skip exec queue schedule toggle if queue is idle during suspend" This reverts commit 8533051ce92015e9cc6f75e0d52119b9d91610b6. The idle-skip optimization bypasses GuC suspend, so the GPU may not perform the context switch that flushes TLB entries for invalidated userptr VMAs. In LR/preempt-fence VM mode, this can lead to missed TLB invalidation and page faults during userptr invalidation tests. Restore unconditional schedule toggling on suspend so the context-switch TLB flush is always performed. This optimization will be reintroduced with a fix that does not skip suspend in LR/preempt-fence VM mode. (cherry picked from commit 6a1e7934d9a6cf46aecae00a99c2603d1295e170)