staging: most: video: avoid double free on video register failure

{
  "id": "7da27f19dbc2b8c70ff8a1d749aff5118d8c2056608c9918055946e108292700",
  "url": "https://osv.dev/vulnerability/CVE-2026-72484",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "staging: most: video: avoid double free on video register failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: staging: most: video: avoid double free on video register failure comp_register_videodev() allocates a video_device with video_device_alloc() and releases it if video_register_device() fails. This can double free the video_device when __video_register_device() reaches device_register() and that call fails: video_register_device() -> __video_register_device() -> device_register() fails -> put_device(&vdev->dev) -> v4l2_device_release() -> vdev->release(vdev) -> video_device_release(vdev) comp_register_videodev() -> video_device_release(mdev->vdev) Use video_device_release_empty() while registering the device so that registration failure paths do not free mdev->vdev through vdev->release(). comp_register_videodev() then releases mdev->vdev exactly once on failure. Restore video_device_release() after successful registration so the registered device keeps its normal lifetime handling. This issue was found by a static analysis tool I am developing.",
    "evidence": "osv:CVE-2026-72484",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
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            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-72484",
      "aliases": [
        "CVE-2026-72484"
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:32.155823704Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/009d58b73500d0b49f6ae3833f8afcb0ebd9ddbb",
        "https://git.kernel.org/stable/c/43078449ad6236d839e4d707954d2e36b10a6706",
        "https://git.kernel.org/stable/c/430ad4ea06a0767fb44a08e2212ceb3a996607ee",
        "https://git.kernel.org/stable/c/46ea51f5b2ee1a3b40c05b7c750cbc5cabe94062",
        "https://git.kernel.org/stable/c/4928096212b78262dbbeab3b3abf2352278ce22d",
        "https://git.kernel.org/stable/c/7cb1c5b32a2bfde961fff8d5204526b609bcb30a",
        "https://git.kernel.org/stable/c/7fc162453cfb7b8e93edb16287a84ba0130cac38",
        "https://git.kernel.org/stable/c/80ed79787da3311f76b4d71d0ce7ab992a9e134d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72484.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72484",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72484.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72484",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 499244,
  "published_at": "2026-08-15T05:57:21.528+00:00"
}