CVE-2026-89870

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8

Information

Published : 2026-09-16 11:16

Updated : 2026-09-16 15:18

NVD link : CVE-2026-89870

Mitre link : CVE-2026-89870

CVE.ORG link : CVE-2026-89870

JSON object : View

Products Affected

No product.

CWE

No CWE.

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After\nvideo_register_device() succeeds, video_unregister_device() drops the\nregistered video_device reference and the V4L2 core eventually invokes\nthat release callback, which kfree()s the video_device.\n\nzoran_exit_video_devices() called video_unregister_device() and then\nkfree(zr->video_dev), so device teardown could free the same\nvideo_device twice.\n\nRemove the direct kfree() and clear the cached pointer after\nunregistering. The pre-registration failure path keeps its manual free\nbecause the video_device was not registered there.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."}], "lastModified": "2026-09-16T15:18:14.187", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}