drm/panthor: fix firmware control interface bounds checks (CVE-2026-89825) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89825

drm/panthor: fix firmware control interface bounds checks

Answer in brief

CVE-2026-89825 records a Unknown severity vulnerability in drm/panthor: fix firmware control interface bounds checks. 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	>=2718d91816eeed03c09c8abe872e45f59078768c <33ae55809aee9b4dca1d00cdee35b527f2bf8626 \|\| >=2718d91816eeed03c09c8abe872e45f59078768c <80c9528661c774f899281c9a72011208ff39929e \|\| >=2718d91816eeed03c09c8abe872e45f59078768c <3e5c7cddc0073eef6f9bb373189b11a969f1f6f6 \|\| >=2718d91816eeed03c09c8abe872e45f59078768c <6a47f9fd2d970674ed9dedc52fc7ab76fd015785	33ae55809aee9b4dca1d00cdee35b527f2bf8626, 80c9528661c774f899281c9a72011208ff39929e, 3e5c7cddc0073eef6f9bb373189b11a969f1f6f6, 6a47f9fd2d970674ed9dedc52fc7ab76fd015785
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 33ae55809aee9b4dca1d00cdee35b527f2bf8626 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/panthor: fix firmware control interface bounds checks panthor_init_cs_iface() and panthor_init_csg_iface() validate firmware control interface offsets with 32-bit arithmetic and the size of the host wrapper structures. The offsets are derived from firmware-provided strides, so the arithmetic can wrap before the bounds check, and the host wrapper size is not the size of the firmware control interface being mapped. Use 64-bit arithmetic for the computed offsets and validate against the actual firmware control interface structure sizes with subtraction-based bounds checks. Also validate that the shared section is large enough for the global control interface before using it.

Quoted source text, attributed separately from HOL analysis.