CVE-2024-43833 media: v4l: async: Fix NULL pointer dereference in adding ancillary links

2024-08-1709:21:50

Linux

www.cve.org

linux kernel

vulnerability

v4l

async

null pointer dereference

ancillary links

sub-device

async notifier

v4l2 device

EPSS

Percentile

5.0%

JSON

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

media: v4l: async: Fix NULL pointer dereference in adding ancillary links

In v4l2_async_create_ancillary_links(), ancillary links are created for
lens and flash sub-devices. These are sub-device to sub-device links and
if the async notifier is related to a V4L2 device, the source sub-device
of the ancillary link is NULL, leading to a NULL pointer dereference.
Check the notifier’s sd field is non-NULL in
v4l2_async_create_ancillary_links().

[Sakari Ailus: Reword the subject and commit messages slightly.]

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/media/v4l2-core/v4l2-async.c"
    ],
    "versions": [
      {
        "version": "aa4faf6eb271",
        "lessThan": "fe0f92fd5320",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa4faf6eb271",
        "lessThan": "249212ceb418",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa4faf6eb271",
        "lessThan": "b87e28050d9b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "aa4faf6eb271",
        "lessThan": "9b4667ea6785",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/media/v4l2-core/v4l2-async.c"
    ],
    "versions": [
      {
        "version": "5.19",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.19",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.103",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.44",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.3",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]