---
id: CVE-2026-43189
title: 'media: v4l2-async: Fix error handling on steps after finding a match'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: v4l2-async: Fix error handling on steps after finding a match

  Once an async connection is found to be matching with an fwnode, a
  sub-device may be registered (i…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    30aaed311f973f13ba13a0cd2dc0202f595fff48
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    461733d83e67ba7e3a5b750c0d203f738e01244f
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    b02bcb378efa8af07827f49b3afcc5e825318c55
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    2de0a3c8148fc3dbea21981e6569f550b3626119
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    7345d6d356336c448d6b9230ed8704f39679fd12
  - Linux 6.6
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T15:30:30.833413Z'
published: '2026-05-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:32:35.703Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43189'
references:
  - url: 'https://git.kernel.org/stable/c/30aaed311f973f13ba13a0cd2dc0202f595fff48'
  - url: 'https://git.kernel.org/stable/c/461733d83e67ba7e3a5b750c0d203f738e01244f'
  - url: 'https://git.kernel.org/stable/c/b02bcb378efa8af07827f49b3afcc5e825318c55'
  - url: 'https://git.kernel.org/stable/c/2de0a3c8148fc3dbea21981e6569f550b3626119'
  - url: 'https://git.kernel.org/stable/c/7345d6d356336c448d6b9230ed8704f39679fd12'
tags:
  - cve.org
epss: 0.00127
epssPercentile: 0.02429
ingestedAt: '2026-11-06T15:54:04.009Z'
---

## Overview

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

media: v4l2-async: Fix error handling on steps after finding a match

Once an async connection is found to be matching with an fwnode, a
sub-device may be registered (in case it wasn't already), its bound
operation is called, ancillary links are created, the async connection
is added to the sub-device's list of connections and removed from the
global waiting connection list. Further on, the sub-device's possible own
notifier is searched for possible additional matches.

Fix these specific issues:

- If v4l2_async_match_notify() failed before the sub-notifier handling,
  the async connection was unbound and its entry removed from the
  sub-device's async connection list. The latter part was also done in
  v4l2_async_match_notify().

- The async connection's sd field was only set after creating ancillary
  links in v4l2_async_match_notify(). It was however dereferenced in
  v4l2_async_unbind_subdev_one(), which was called on error path of
  v4l2_async_match_notify() failure.

## Affected

- `Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 < 30aaed311f973f13ba13a0cd2dc0202f595fff48`
- `Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 < 461733d83e67ba7e3a5b750c0d203f738e01244f`
- `Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 < b02bcb378efa8af07827f49b3afcc5e825318c55`
- `Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 < 2de0a3c8148fc3dbea21981e6569f550b3626119`
- `Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 < 7345d6d356336c448d6b9230ed8704f39679fd12`
- `Linux 6.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.