---
id: CVE-2026-89820
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: fix dc_lock leak on GPU reset error paths

  On GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume()
  to drop
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: fix dc_lock leak on GPU reset error paths

  On GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume()
  to drop. If amdgpu_dm_commit_zero_str…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f <
    295d2bf42061db490254e748f9344545bb7faf19
  - >-
    Linux >= 3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f <
    dac29cbb405b912742f4f7eda833cec8e7a53780
  - >-
    Linux >= 3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f <
    92a9eebd2a1f892fe482154d83f9f1626bc73d3b
  - Linux 6.15
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:16:47.383'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89820'
references:
  - url: 'https://git.kernel.org/stable/c/295d2bf42061db490254e748f9344545bb7faf19'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/92a9eebd2a1f892fe482154d83f9f1626bc73d3b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dac29cbb405b912742f4f7eda833cec8e7a53780'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89820.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89820'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2535168'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89820'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89820'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89820.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-16T10:53:54.002Z'
epss: 0.00206
epssPercentile: 0.09521
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-772
---

## Overview

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

drm/amd/display: fix dc_lock leak on GPU reset error paths

On GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume()
to drop. If amdgpu_dm_commit_zero_streams() or dm_dmub_hw_init() fails,
the function returns with the lock still held. The matching resume path
is then skipped, so every later dc_lock take hangs.

Release the cached DC state and unlock before returning the error.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89820.json)