CVE-2026-89870

Summary

In the Linux kernel, the following vulnerability has been resolved:

media: zoran: Avoid freeing a registered video_device twice

zoran_init_video_device() installs zoran_vdev_release() as the video_device release callback through zoran_template. After video_register_device() succeeds, video_unregister_device() drops the registered video_device reference and the V4L2 core eventually invokes that release callback, which kfree()s the video_device.

zoran_exit_video_devices() called video_unregister_device() and then kfree(zr->video_dev), so device teardown could free the same video_device twice.

Remove the direct kfree() and clear the cached pointer after unregistering. The pre-registration failure path keeps its manual free because the video_device was not registered there.

This issue was found by a static analysis checker and confirmed by manual source review.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/3ad6cf27505017a6794f5f96c31218c2291e951b
• https://git.kernel.org/stable/c/c4acac8cdc005b2d14b6cef5e215d264212857f3
• https://git.kernel.org/stable/c/4d99d8d0d895489064783601a516bd45812fa992
• https://git.kernel.org/stable/c/f1c4f3885df1f09bcab5296d86834d104f865e86
• https://git.kernel.org/stable/c/672dbccf4351370dad002d3c78dbb29ca1588f22
• https://git.kernel.org/stable/c/0735e0b5a96761a9ce277a238e834008ad92a0a5

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