Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 009d58b73500d0b49f6ae3833f8afcb0ebd9ddbb; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 430ad4ea06a0767fb44a08e2212ceb3a996607ee; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 46ea51f5b2ee1a3b40c05b7c750cbc5cabe94062; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 4928096212b78262dbbeab3b3abf2352278ce22d; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 80ed79787da3311f76b4d71d0ce7ab992a9e134d; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 43078449ad6236d839e4d707954d2e36b10a6706; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 7fc162453cfb7b8e93edb16287a84ba0130cac38; affected eab231c0398a91fbd294672bfe9e0ff45b368246 before 7cb1c5b32a2bfde961fff8d5204526b609bcb30a |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/009d58b73500d0b49f6ae3833f8afcb0ebd9ddbb
- 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/80ed79787da3311f76b4d71d0ce7ab992a9e134d
- https://git.kernel.org/stable/c/43078449ad6236d839e4d707954d2e36b10a6706
- https://git.kernel.org/stable/c/7fc162453cfb7b8e93edb16287a84ba0130cac38
- https://git.kernel.org/stable/c/7cb1c5b32a2bfde961fff8d5204526b609bcb30a