---
id: CVE-2026-89874
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: v4l2-async: avoid deleting unlinked ASC entry on link error

  v4l2_async_match_notify() creates ancillary media links before adding
  asc->asc_subdev_entry to sd->a…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: v4l2-async: avoid deleting unlinked ASC entry on link error

  v4l2_async_match_notify() creates ancillary media links before adding
  asc->asc_subdev_entry to sd->a…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    d273571e531405426983c6a45ec635c7d0415eed
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    caac13f518d83974e9884d1eeda3d4cc3bb92978
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    3345746e0957bce6c53644838e4955710a82a962
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    a57d94026cb4fd7b3d258f0db2ad391cbccfaba5
  - >-
    Linux >= 28a1295795d85a25f2e7dd391c43969e95fcb341 <
    47d82b605351c0e04f6365e42c8ffe2fcfdba615
  - Linux 6.6
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:16:55.643'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89874'
references:
  - url: 'https://git.kernel.org/stable/c/3345746e0957bce6c53644838e4955710a82a962'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/47d82b605351c0e04f6365e42c8ffe2fcfdba615'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a57d94026cb4fd7b3d258f0db2ad391cbccfaba5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/caac13f518d83974e9884d1eeda3d4cc3bb92978'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d273571e531405426983c6a45ec635c7d0415eed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.986Z'
epss: 0.002
epssPercentile: 0.08722
---

## Overview

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

media: v4l2-async: avoid deleting unlinked ASC entry on link error

v4l2_async_match_notify() creates ancillary media links before adding
asc->asc_subdev_entry to sd->asc_list.

If ancillary link creation fails, the function jumps to
err_call_unbind while asc_subdev_entry has not been linked yet. Async
connections are zero-allocated, so the list entry still has NULL next
and prev pointers on this path. Calling list_del() on it can therefore
dereference NULL instead of returning the original link creation error.

Do not delete asc_subdev_entry from err_call_unbind. There is no list
insertion to undo on this path; the bound callback and sub-device
registration are the operations that need to be rolled back.

## Remediation

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