CVE-2023-52773 drm/amd/display: fix a NULL pointer dereference in amdgpu_dm_i2c_xfer()

2024-05-2115:30:54

Linux

github.com

linux kernel

vulnerability

amdgpu_dm_i2c_xfer()

igt test

null pointer

ddc_service_construct()

link type

AI Score

6.8

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

drm/amd/display: fix a NULL pointer dereference in amdgpu_dm_i2c_xfer()

When ddc_service_construct() is called, it explicitly checks both the
link type and whether there is something on the link which will
dictate whether the pin is marked as hw_supported.

If the pin isn’t set or the link is not set (such as from
unloading/reloading amdgpu in an IGT test) then fail the
amdgpu_dm_i2c_xfer() call.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "22676bc500c2",
        "lessThan": "fb5c134ca589",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22676bc500c2",
        "lessThan": "5b14cf37b9f0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22676bc500c2",
        "lessThan": "1d07b7e84276",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "22676bc500c2",
        "lessThan": "b71f4ade1b89",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.0",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "6.1.64",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.5.13",
        "versionType": "custom",
        "lessThanOrEqual": "6.5.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.3",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"
    ],
    "defaultStatus": "affected"
  }
]