drm/connector/hdmi: Fix out of bounds memory read (CVE-2026-80749) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80749

drm/connector/hdmi: Fix out of bounds memory read

Answer in brief

CVE-2026-80749 records a Unknown severity vulnerability in drm/connector/hdmi: Fix out of bounds memory read. 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 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 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	>=f378b77227bc4732922c57f92be89438bb1018a1 <d9f7454c185c0c7f0973e11d62ad6c06862c324c \|\| >=f378b77227bc4732922c57f92be89438bb1018a1 <e5b527804a1ea4f70e139179d3062cf5de8c06ab \|\| >=f378b77227bc4732922c57f92be89438bb1018a1 <f72bb95732bc5ca87b50c52c8f087ba501950809 \|\| >=f378b77227bc4732922c57f92be89438bb1018a1 <9ecf8ba763d0ffe0673538eb4bf7806f20455d19	d9f7454c185c0c7f0973e11d62ad6c06862c324c, e5b527804a1ea4f70e139179d3062cf5de8c06ab, f72bb95732bc5ca87b50c52c8f087ba501950809, 9ecf8ba763d0ffe0673538eb4bf7806f20455d19
Linux/Linuxgeneric	6.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d9f7454c185c0c7f0973e11d62ad6c06862c324c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/connector/hdmi: Fix out of bounds memory read A helper function was copying a given audio infoframe into the connector's copy but using the size of the destination (a generic target, sized to accept many different data blocks) not the source (a very specific type of data block). Thus, it was copying 60 bytes of data from a 28 byte allocation. Fix that by using the source size instead, together with a build bug on the source size actually being smaller than the destination. I hit this running KUnit tests under KASAN (while debugging something else entirely). In the real world, it seems unlikely to cause an actual problem. It is a read not a write so it can't corrupt any memory. However, it could potentially fall off the end of a page and cause an accvio bug.

Quoted source text, attributed separately from HOL analysis.