Linux Kernel up to 6.18.50/7.2.4/7.3-rc1 amdkfd/MES Queue Management amdkfd evict_process_queues_cpsch/suspend_queues race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.43-

Summaryinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 6.18.50/7.2.4/7.3-rc1. Affected is the function evict_process_queues_cpsch/suspend_queues of the file drivers/gpu/drm/amd/amdkfd of the component amdkfd/MES Queue Management. The manipulation results in race condition. This vulnerability is cataloged as CVE-2026-89811. The attack must be initiated from a local position. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 6.18.50/7.2.4/7.3-rc1. Affected is the function evict_process_queues_cpsch/suspend_queues of the file drivers/gpu/drm/amd/amdkfd of the component amdkfd/MES Queue Management. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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)

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-89811 since 09/11/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/16/2026).

Upgrading to version 6.18.51, 7.2.5 or 7.3-rc2 eliminates this vulnerability. Applying the patch e230c546ed93741833ab5babb0b202f9c2052b45/6aae545c87087e4dc96e205452243813bfa73ba2/94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.51/7.2.5/7.3-rc2
Patch: e230c546ed93741833ab5babb0b202f9c2052b45/6aae545c87087e4dc96e205452243813bfa73ba2/94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89811 (🔒)
GCVE (CVE): GCVE-0-2026-89811
GCVE (VulDB): GCVE-100-405624

Entryinfo

Created: 09/16/2026 12:56
Changes: 09/16/2026 12:56 (60)
Complete: 🔍
Cache ID: 216::103

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