High [CVE-2026-53201] Revert "drm/xe: Skip exec queue schedule toggle if queue is idle during suspend"
This high-severity Red Hat Linux advisory covers CVE-2026-53201.
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Summary
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) A flaw was found in the Linux kernel's `drm/xe` graphics driver.
An optimization intended to skip execution queue schedule toggling during GPU suspend could bypass a critical GuC suspend operation. This bypass prevents the GPU from properly flushing Translation Lookaside Buffer (TLB) entries for invalidated user memory areas, particularly in specific virtual memory modes.
A local attacker could exploit this to cause missed TLB invalidations and page faults, potentially leading to information disclosure or a denial of service. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
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