drm/amd/display: fix dc_lock leak on GPU reset error paths (CVE-2026-89820) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89820

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

Answer in brief

CVE-2026-89820 records a Unknown severity vulnerability in drm/amd/display: fix dc_lock leak on GPU reset error paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f <295d2bf42061db490254e748f9344545bb7faf19 \|\| >=3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f <dac29cbb405b912742f4f7eda833cec8e7a53780 \|\| >=3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f <92a9eebd2a1f892fe482154d83f9f1626bc73d3b	295d2bf42061db490254e748f9344545bb7faf19, dac29cbb405b912742f4f7eda833cec8e7a53780, 92a9eebd2a1f892fe482154d83f9f1626bc73d3b
Linux/Linuxgeneric	6.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 295d2bf42061db490254e748f9344545bb7faf19 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.