drm/panthor: validate firmware interface structure sizes (CVE-2026-74451) | HOL Guard CVE

High · CVSS 7.8CVE-2026-74451

drm/panthor: validate firmware interface structure sizes

Answer in brief

CVE-2026-74451 records a High severity (CVSS 7.8) vulnerability in drm/panthor: validate firmware interface structure sizes. 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 Aug 15, 2026Updated Aug 17, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. 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	>=2718d91816eeed03c09c8abe872e45f59078768c <21c77486f5a60bb9c0433c21de62a5f25d5091f1 \|\| >=2718d91816eeed03c09c8abe872e45f59078768c <c835f2b0b7167584832b516c9b0a26e9180d1d0b \|\| >=2718d91816eeed03c09c8abe872e45f59078768c <ca41d9f3a21586bf29df53eec05152ecf2b2f94f \|\| >=2718d91816eeed03c09c8abe872e45f59078768c <b921b8613790a3f9e78ab64017fa7149ef0b750c	21c77486f5a60bb9c0433c21de62a5f25d5091f1, c835f2b0b7167584832b516c9b0a26e9180d1d0b, ca41d9f3a21586bf29df53eec05152ecf2b2f94f, b921b8613790a3f9e78ab64017fa7149ef0b750c
Linux/Linuxgeneric	6.10	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 21c77486f5a60bb9c0433c21de62a5f25d5091f1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: validate firmware interface structure sizes iface_fw_to_cpu_addr() only checks that the firmware-provided MCU virtual address points inside the shared section. The returned pointer is later used as a full firmware interface structure, so accepting an address near the end of the shared section can still lead to out-of-bounds accesses. Pass the expected object size to iface_fw_to_cpu_addr() and reject ranges that do not fit entirely in the shared section.

Quoted source text, attributed separately from HOL analysis.