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CVE-2026-89870

HIGHCVSS 7.8/10

Last modified

CVE-2026-89870 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.

Description

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 82e3a496eb56da0b9f29fdc5b63cedb3289e91de, < 3ad6cf27505017a6794f5f96c31218c2291e951b; >= 82e3a496eb56da0b9f29fdc5b63cedb3289e91de, < c4acac8cdc005b2d14b6cef5e215d264212857f3; >= 82e3a496eb56da0b9f29fdc5b63cedb3289e91de, < 4d99d8d0d895489064783601a516bd45812fa992; >= 82e3a496eb56da0b9f29fdc5b63cedb3289e91de, < f1c4f3885df1f09bcab5296d86834d104f865e86; >= 82e3a496eb56da0b9f29fdc5b63cedb3289e91de, < 672dbccf4351370dad002d3c78dbb29ca1588f22; >= 82e3a496eb56da0b9f29fdc5b63cedb3289e91de, < 0735e0b5a96761a9ce277a238e834008ad92a0a5; bd01629315ffd5b63da91d0bd529a77d30e55028; ff3357bffd9fb78f59762d8955afc7382a279079; c1ba65100a359fe28cfe37e09e10c99f247cbf1e; 1e501ec38796f43e995731d1bcd4173cb1ccfce0; >= 5.10.110, < 5.11; >= 5.15.33, < 5.16; >= 5.16.19, < 5.17; >= 5.17.2, < 5.18
LinuxLinux5.18

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-89870?
CVE-2026-89870 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-89870?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST