GHSA-79GV-9P52-G5CR
Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-72484"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T06:22:22Z",
"severity": null
},
"details": "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.",
"id": "GHSA-79gv-9p52-g5cr",
"modified": "2026-08-15T06:32:26Z",
"published": "2026-08-15T06:32:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72484"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/009d58b73500d0b49f6ae3833f8afcb0ebd9ddbb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/43078449ad6236d839e4d707954d2e36b10a6706"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/430ad4ea06a0767fb44a08e2212ceb3a996607ee"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/46ea51f5b2ee1a3b40c05b7c750cbc5cabe94062"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4928096212b78262dbbeab3b3abf2352278ce22d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7cb1c5b32a2bfde961fff8d5204526b609bcb30a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7fc162453cfb7b8e93edb16287a84ba0130cac38"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/80ed79787da3311f76b4d71d0ce7ab992a9e134d"
}
],
"schema_version": "1.4.0",
"severity": []
}
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