CVE-2026-89811

8.8 HIGH

Published 2026-09-16 · Updated 2026-09-17

AI risk analysis

Summary: This vulnerability arises from the lack of TLB invalidation in the Micro Engine Scheduler (MES) for AMD GPU drivers, leading to potential page faults and GPU queue hangs during SVM page migration.
Exploitability: Exploitation requires specific conditions, such as XNACK mode 1 enabled on gfx1151 (Strix Point) GPUs, making it moderately difficult to exploit.
Blast radius: If exploited, this could lead to system instability and potential denial of service for affected GPUs, impacting applications relying on GPU compute queues.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the Linux kernel version 6.1.17 or later, which includes the necessary TLB flush patches.

gputlbsvmkernel

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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)

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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