FKIE_CVE-2026-89874

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 11:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: avoid deleting unlinked ASC entry on link error v4l2_async_match_notify() creates ancillary media links before adding asc->asc_subdev_entry to sd->asc_list. If ancillary link creation fails, the function jumps to err_call_unbind while asc_subdev_entry has not been linked yet. Async connections are zero-allocated, so the list entry still has NULL next and prev pointers on this path. Calling list_del() on it can therefore dereference NULL instead of returning the original link creation error. Do not delete asc_subdev_entry from err_call_unbind. There is no list insertion to undo on this path; the bound callback and sub-device registration are the operations that need to be rolled back.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3345746e0957bce6c53644838e4955710a82a962
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47d82b605351c0e04f6365e42c8ffe2fcfdba615
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a57d94026cb4fd7b3d258f0db2ad391cbccfaba5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/caac13f518d83974e9884d1eeda3d4cc3bb92978
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d273571e531405426983c6a45ec635c7d0415eed
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/v4l2-core/v4l2-async.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d273571e531405426983c6a45ec635c7d0415eed",
              "status": "affected",
              "version": "28a1295795d85a25f2e7dd391c43969e95fcb341",
              "versionType": "git"
            },
            {
              "lessThan": "caac13f518d83974e9884d1eeda3d4cc3bb92978",
              "status": "affected",
              "version": "28a1295795d85a25f2e7dd391c43969e95fcb341",
              "versionType": "git"
            },
            {
              "lessThan": "3345746e0957bce6c53644838e4955710a82a962",
              "status": "affected",
              "version": "28a1295795d85a25f2e7dd391c43969e95fcb341",
              "versionType": "git"
            },
            {
              "lessThan": "a57d94026cb4fd7b3d258f0db2ad391cbccfaba5",
              "status": "affected",
              "version": "28a1295795d85a25f2e7dd391c43969e95fcb341",
              "versionType": "git"
            },
            {
              "lessThan": "47d82b605351c0e04f6365e42c8ffe2fcfdba615",
              "status": "affected",
              "version": "28a1295795d85a25f2e7dd391c43969e95fcb341",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/v4l2-core/v4l2-async.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-async: avoid deleting unlinked ASC entry on link error\n\nv4l2_async_match_notify() creates ancillary media links before adding\nasc-\u003easc_subdev_entry to sd-\u003easc_list.\n\nIf ancillary link creation fails, the function jumps to\nerr_call_unbind while asc_subdev_entry has not been linked yet. Async\nconnections are zero-allocated, so the list entry still has NULL next\nand prev pointers on this path. Calling list_del() on it can therefore\ndereference NULL instead of returning the original link creation error.\n\nDo not delete asc_subdev_entry from err_call_unbind. There is no list\ninsertion to undo on this path; the bound callback and sub-device\nregistration are the operations that need to be rolled back."
    }
  ],
  "id": "CVE-2026-89874",
  "lastModified": "2026-09-16T11:16:55.643",
  "metrics": {},
  "published": "2026-09-16T11:16:55.643",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3345746e0957bce6c53644838e4955710a82a962"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/47d82b605351c0e04f6365e42c8ffe2fcfdba615"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a57d94026cb4fd7b3d258f0db2ad391cbccfaba5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/caac13f518d83974e9884d1eeda3d4cc3bb92978"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d273571e531405426983c6a45ec635c7d0415eed"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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