CVE-2026-72484

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

State: Published
Severity: Not scored
Published: Aug 15, 2026
Updated: Aug 17, 2026
Reserved: Aug 9, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	eab231c0398a91fbd294672bfe9e0ff45b368246 to before 009d58b73500d0b49f6ae3833f8afcb0ebd9ddbbAffected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 430ad4ea06a0767fb44a08e2212ceb3a996607eeAffected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 46ea51f5b2ee1a3b40c05b7c750cbc5cabe94062Affected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 4928096212b78262dbbeab3b3abf2352278ce22dAffected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 80ed79787da3311f76b4d71d0ce7ab992a9e134dAffected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 43078449ad6236d839e4d707954d2e36b10a6706Affected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 7fc162453cfb7b8e93edb16287a84ba0130cac38Affected eab231c0398a91fbd294672bfe9e0ff45b368246 to before 7cb1c5b32a2bfde961fff8d5204526b609bcb30aAffected
LinuxLinux	4.9Affected before 4.9Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

eab231c0398a91fbd294672bfe9e0ff45b368246 to before 009d58b73500d0b49f6ae3833f8afcb0ebd9ddbbAffected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 430ad4ea06a0767fb44a08e2212ceb3a996607eeAffected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 46ea51f5b2ee1a3b40c05b7c750cbc5cabe94062Affected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 4928096212b78262dbbeab3b3abf2352278ce22dAffected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 80ed79787da3311f76b4d71d0ce7ab992a9e134dAffected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 43078449ad6236d839e4d707954d2e36b10a6706Affected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 7fc162453cfb7b8e93edb16287a84ba0130cac38Affected
eab231c0398a91fbd294672bfe9e0ff45b368246 to before 7cb1c5b32a2bfde961fff8d5204526b609bcb30aAffected

LinuxLinux

4.9Affected
before 4.9Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.