---
id: CVE-2026-89897
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: cec: Serialize exclusive follower delivery

  cec_receive_notify() reads the exclusive follower pointer without the
  adapter lock
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: cec: Serialize exclusive follower delivery

  cec_receive_notify() reads the exclusive follower pointer without the
  adapter lock. Serialize the no-follower check a…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    efc829b4b937f98c4467bffe9243f756b7cfbf7f
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    cac577854826950dda4d53569728b1da6c1425d5
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    4b532b271c91790b7ab661cd488a7ad36f5c4f6b
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    271e57a936dcdbaecb4b1bd005d9a285bbe60ab4
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    df941e6851da17fc53c7f6af2bdcc7383d17babc
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    5c62095acc2a952099688774513c4a637bcdb2b5
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    ae614f48712156fb0f55b207338d48d422c58bc0
  - >-
    Linux >= 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 <
    1924d0788caa6c66fd320dd4704fae99487fd2c7
  - Linux 4.8
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:15.943'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89897'
references:
  - url: 'https://git.kernel.org/stable/c/1924d0788caa6c66fd320dd4704fae99487fd2c7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/271e57a936dcdbaecb4b1bd005d9a285bbe60ab4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4b532b271c91790b7ab661cd488a7ad36f5c4f6b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5c62095acc2a952099688774513c4a637bcdb2b5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ae614f48712156fb0f55b207338d48d422c58bc0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cac577854826950dda4d53569728b1da6c1425d5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/df941e6851da17fc53c7f6af2bdcc7383d17babc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/efc829b4b937f98c4467bffe9243f756b7cfbf7f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.978Z'
epss: 0.00357
epssPercentile: 0.26634
---

## Overview

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

media: cec: Serialize exclusive follower delivery

cec_receive_notify() reads the exclusive follower pointer without the
adapter lock. Serialize the no-follower check and message delivery
against mode changes and release.

## Remediation

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