---
id: CVE-2024-26662
title: >-
  drm/amd/display: Fix 'panel_cntl' could be null in
  'dcn21_set_backlight_level()'
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  drm/amd/display: Fix 'panel_cntl' could be null in
  'dcn21_set_backlight_level()'


  'panel_cntl' structure used to control the display panel could be null,

  dereferencing …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 <
    94a506cbfd1bd4817502bed097e24cbab23cfce3
  - >-
    Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 <
    2e150ccea13129eb048679114808eb9770443e4d
  - >-
    Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 <
    0c863cab0e9173f8b6c7bc328bee3b8625f131b5
  - >-
    Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 <
    e96fddb32931d007db12b1fce9b5e8e4c080401b
  - Linux 5.9
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-04-02T15:53:23.636262Z'
published: '2024-04-02'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:17:44.443Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-26662'
references:
  - url: 'https://git.kernel.org/stable/c/94a506cbfd1bd4817502bed097e24cbab23cfce3'
  - url: 'https://git.kernel.org/stable/c/2e150ccea13129eb048679114808eb9770443e4d'
  - url: 'https://git.kernel.org/stable/c/0c863cab0e9173f8b6c7bc328bee3b8625f131b5'
  - url: 'https://git.kernel.org/stable/c/e96fddb32931d007db12b1fce9b5e8e4c080401b'
tags:
  - cve.org
epss: 0.00225
epssPercentile: 0.13244
ingestedAt: '2026-11-03T11:43:15.792Z'
---

## Overview

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

drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()'

'panel_cntl' structure used to control the display panel could be null,
dereferencing it could lead to a null pointer access.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn21/dcn21_hwseq.c:269 dcn21_set_backlight_level() error: we previously assumed 'panel_cntl' could be null (see line 250)

## Affected

- `Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 < 94a506cbfd1bd4817502bed097e24cbab23cfce3`
- `Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 < 2e150ccea13129eb048679114808eb9770443e4d`
- `Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 < 0c863cab0e9173f8b6c7bc328bee3b8625f131b5`
- `Linux >= 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 < e96fddb32931d007db12b1fce9b5e8e4c080401b`
- `Linux 5.9`

## Remediation

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