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CVE-2026-72484 (GCVE-0-2026-72484)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:15
VLAI
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 009d58b73500d0b49f6ae3833f8afcb0ebd9ddbb (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 430ad4ea06a0767fb44a08e2212ceb3a996607ee (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 46ea51f5b2ee1a3b40c05b7c750cbc5cabe94062 (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 4928096212b78262dbbeab3b3abf2352278ce22d (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 80ed79787da3311f76b4d71d0ce7ab992a9e134d (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 43078449ad6236d839e4d707954d2e36b10a6706 (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 7fc162453cfb7b8e93edb16287a84ba0130cac38 (git)
Affected: eab231c0398a91fbd294672bfe9e0ff45b368246 , < 7cb1c5b32a2bfde961fff8d5204526b609bcb30a (git)
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Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: most: video: avoid double free on video register failure\n\ncomp_register_videodev() allocates a video_device with\nvideo_device_alloc() and releases it if video_register_device() fails.\n\nThis can double free the video_device when __video_register_device()\nreaches device_register() and that call fails:\n\n  video_register_device()\n    -\u003e __video_register_device()\n       -\u003e device_register() fails\n          -\u003e put_device(\u0026vdev-\u003edev)\n             -\u003e v4l2_device_release()\n                -\u003e vdev-\u003erelease(vdev)\n                   -\u003e video_device_release(vdev)\n\n  comp_register_videodev()\n    -\u003e video_device_release(mdev-\u003evdev)\n\nUse video_device_release_empty() while registering the device so that\nregistration failure paths do not free mdev-\u003evdev through vdev-\u003erelease().\ncomp_register_videodev() then releases mdev-\u003evdev exactly once on failure.\nRestore video_device_release() after successful registration so the\nregistered device keeps its normal lifetime handling.\n\nThis issue was found by a static analysis tool I am developing."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:15:34.687Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "cveId": "CVE-2026-72484",
    "datePublished": "2026-08-15T05:57:21.528Z",
    "dateReserved": "2026-08-09T03:40:39.935Z",
    "dateUpdated": "2026-08-17T05:15:34.687Z",
    "state": "PUBLISHED"
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      "date": "2026-09-04",
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video_device_release(vdev)\\n\\n  comp_register_videodev()\\n    -\u003e video_device_release(mdev-\u003evdev)\\n\\nUse video_device_release_empty() while registering the device so that\\nregistration failure paths do not free mdev-\u003evdev through vdev-\u003erelease().\\ncomp_register_videodev() then releases mdev-\u003evdev exactly once on failure.\\nRestore video_device_release() after successful registration so the\\nregistered device keeps its normal lifetime handling.\\n\\nThis issue was found by a static analysis tool I am 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T17:08:22+00:00",
      "cve": "CVE-2026-72484",
      "id": "CVE-2026-72484",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: staging: most: video: avoid double free on video register failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72484.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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