---
id: CVE-2026-89812
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdgpu: force complete the MES ring fences on reset

  The MES scheduler ring has no drm scheduler (no_scheduler = true), so it is
  skipped by the force-completion loo…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdgpu: force complete the MES ring fences on reset

  The MES scheduler ring has no drm scheduler (no_scheduler = true), so it is
  skipped by the force-completion loo…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    ebe7542553d008e2285e0fbba0c63f0295a7e694
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    48dc279c3010ac8f91b1845b2abb3a1e9943a0f5
  - Linux < 7.2.5
  - Linux (all versions)
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T10:17:04.390'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89812'
references:
  - url: 'https://git.kernel.org/stable/c/48dc279c3010ac8f91b1845b2abb3a1e9943a0f5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ebe7542553d008e2285e0fbba0c63f0295a7e694'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:54.006Z'
epss: 0.00198
epssPercentile: 0.0848
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: force complete the MES ring fences on reset

The MES scheduler ring has no drm scheduler (no_scheduler = true), so it is
skipped by the force-completion loop in amdgpu_device_pre_asic_reset(). It uses
a polling fence whose hw value lives in wb (GTT) memory and survives a MODE1
reset, while fence_drv.sync_seq keeps advancing for every packet.

When the reset is triggered because MES itself stopped responding, the
timed-out packets advance sync_seq past the last hw fence value MES wrote.
After resume the first MES submission polls forever on a seq that is never
written back, failing the resume and wedging the box on a second reset:

  amdgpu: MES ring buffer is full.
  amdgpu: *ERROR* ring gfx_0.0.0 test failed (-110)
  amdgpu: resume of IP block <gfx_v11_0> failed -110
  amdgpu: GPU reset end with ret = -110

Force complete the MES scheduler ring fences together with the scheduler rings
so their hw fence is realigned to sync_seq.

v2: cover all XCCs (one scheduler ring each), not just mes.ring[0].

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.