drm/amd/display: Resize MST HDCP per-connector arrays to 32 (CVE-2026-90289) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90289

drm/amd/display: Resize MST HDCP per-connector arrays to 32

Answer in brief

CVE-2026-90289 records a Unknown severity vulnerability in drm/amd/display: Resize MST HDCP per-connector arrays to 32. 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 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 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	>=82986fd631fa04bcedaefe11a6b3767601cbe84f <0fa116a17b69a28712cdf209318e345b676d7f6c \|\| >=82986fd631fa04bcedaefe11a6b3767601cbe84f <261e0fe4e2c99f687114b64b10b98db964b475f4 \|\| 99c444d3c3c43db354b253d9bfac081073dcb484 \|\| d90f97cb3821c47bdf773dcf6cade143773ec764 \|\| >=5.15.128 <5.16 \|\| >=6.1.47 <6.2	0fa116a17b69a28712cdf209318e345b676d7f6c, 261e0fe4e2c99f687114b64b10b98db964b475f4, 5.16, 6.2
Linux/Linuxgeneric	6.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 0fa116a17b69a28712cdf209318e345b676d7f6c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Resize MST HDCP per-connector arrays to 32 AMDGPU_DM_MAX_DISPLAY_INDEX is 31. It suggest a maximum number of 32 connectors. But the way it's used is like MAX_DISPLAY_COUNT. Hence we're off by one with DRM core, which supports a max of 32 connectors. Rename AMDGPU_DM_MAX_DISPLAY_INDEX to AMDGPU_DM_MAX_DISPLAY_COUNT to match its actual use, and increase the size to 32 to match the originally intended size.

Quoted source text, attributed separately from HOL analysis.