---
id: CVE-2026-31460
title: 'drm/amd/display: check if ext_caps is valid in BL setup'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amd/display: check if ext_caps is valid in BL setup

  LVDS connectors don't have extended backlight caps so check
  if the pointer is valid before accessing it.

  (cher…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1454642960b0a4fafd48b08919d39350ee2ac372 <
    60b0524bfb7d691ab378cdc788209f11cd34da89
  - >-
    Linux >= 1454642960b0a4fafd48b08919d39350ee2ac372 <
    9da4f9964abcaeb6e19797d5e3b10faad338a786
  - Linux 6.19
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:34:15.354899Z'
published: '2026-04-22'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:45:00.180Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-31460'
references:
  - url: 'https://git.kernel.org/stable/c/60b0524bfb7d691ab378cdc788209f11cd34da89'
  - url: 'https://git.kernel.org/stable/c/9da4f9964abcaeb6e19797d5e3b10faad338a786'
tags:
  - cve.org
epss: 0.00107
epssPercentile: 0.01158
ingestedAt: '2026-11-05T22:38:32.147Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: check if ext_caps is valid in BL setup

LVDS connectors don't have extended backlight caps so check
if the pointer is valid before accessing it.

(cherry picked from commit 3f797396d7f4eb9bb6eded184bbc6f033628a6f6)

## Affected

- `Linux >= 1454642960b0a4fafd48b08919d39350ee2ac372 < 60b0524bfb7d691ab378cdc788209f11cd34da89`
- `Linux >= 1454642960b0a4fafd48b08919d39350ee2ac372 < 9da4f9964abcaeb6e19797d5e3b10faad338a786`
- `Linux 6.19`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.