drm/amdkfd: Add TLB flush after MES queue eviction/suspension (CVE-2026-89811) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89811

drm/amdkfd: Add TLB flush after MES queue eviction/suspension

Answer in brief

CVE-2026-89811 records a Unknown severity vulnerability in drm/amdkfd: Add TLB flush after MES queue eviction/suspension. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e230c546ed93741833ab5babb0b202f9c2052b45 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6aae545c87087e4dc96e205452243813bfa73ba2 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4 \|\| >=0 <6.18.51 \|\| >=0 <7.2.5	e230c546ed93741833ab5babb0b202f9c2052b45, 6aae545c87087e4dc96e205452243813bfa73ba2, 94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4, 6.18.51, 7.2.5

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
Review the reported fix. Update Linux/Linux to e230c546ed93741833ab5babb0b202f9c2052b45 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Add TLB flush after MES queue eviction/suspension MES (Micro Engine Scheduler) does not perform heavy-weight TLB invalidation after unmapping queues, unlike HWS which does this automatically. This causes a race condition where in-flight DMA descriptors can access memory that has been unmapped, leading to page faults and GPU queue hangs during SVM page migration. The issue manifests as KFDSVMRangeTest.MultiThreadMigrationTest failures on gfx1151 (Strix Point) with XNACK mode 1 enabled - the GPU compute queue hangs with packets submitted but never consumed. Add kfd_flush_tlb() calls after MES queue removal in two locations: - evict_process_queues_cpsch(): after all queues removed during eviction - suspend_queues(): after debug/criu queue suspension (with mem_fence barrier) This ensures all in-flight memory accesses from unmapped queues are flushed before memory is freed or migrated. (cherry picked from commit f5c4f88e0f9c45a8fb9dfac0c1df726c95e41b77)

Quoted source text, attributed separately from HOL analysis.