CVE-2024-26662 drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()'

2024-04-0206:22:11

Linux

github.com

linux kernel

display driver

vulnerability

AI Score

6.6

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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)

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "474ac4a875ca",
        "lessThan": "2e150ccea131",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "474ac4a875ca",
        "lessThan": "0c863cab0e91",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "474ac4a875ca",
        "lessThan": "e96fddb32931",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.9",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "6.6.17",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7.5",
        "versionType": "custom",
        "lessThanOrEqual": "6.7.*"
      },
      {
        "status": "unaffected",
        "version": "6.8",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c"
    ],
    "defaultStatus": "affected"
  }
]