What is CVE-2026-89811?

CVE-2026-89811 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 5.19 onward and patched in 6.18.51, 7.2.5 and 7.3-rc2. CVE-2026-89811 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89811?

CVE-2026-89811 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-89811?

Yes, CVE-2026-89811 has been patched. Fixed versions include 6.18.51, 7.2.5 and 7.3-rc2. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89811 actively exploited?

CVE-2026-89811 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89811

High

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)

Package Linux Kernel

Published 2026-09-16

Last modified 2026-09-17

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.19 and later are affected. Fixed in 6.18.51, 7.2.5, 7.3-rc2 and their respective stable series.

Affected from

≥ 5.19

Fixed in

✓ 6.18.51 6.18.x ✓ 7.2.5 7.2.x ✓ 7.3-rc2

References

3 total

Details

CVE ID CVE-2026-89811

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-09-16

Modified 2026-09-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-89811?

CVE-2026-89811 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 5.19 onward and has been patched in 6.18.51, 7.2.5 and 7.3-rc2. CVE-2026-89811 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-89811?

CVE-2026-89811 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2026-89811?

Yes. CVE-2026-89811 has been patched. Fixed versions include 6.18.51, 7.2.5 and 7.3-rc2. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89811 actively exploited?

No. CVE-2026-89811 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.