---
id: CVE-2026-89982
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  i2c: mux: Fix channel node leak on adapter add failure

  i2c_mux_add_adapter() takes a reference to the Device Tree channel node
  before registering the new adapter
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  i2c: mux: Fix channel node leak on adapter add failure

  i2c_mux_add_adapter() takes a reference to the Device Tree channel node
  before registering the new adapter. If a…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    4f42f70afd2447f3c82ca69d1e03466a75348ba9
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    4c9bc46a2a4afb7a11c48d33bdf19febab431015
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    dd2c1e6747b17b24ecddd48a7bb6bb964c2793d1
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    0927153f2abf48b6cc3e5f27063a17f7a8d47f38
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    b580f062b24c4eef562f08f210c028adb34ef14e
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    2b3b06cb709c4bf75a3fe3da3a0ca368ee3b40e5
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    694e7e6edf249723ca7d3ef77c2ca1badfc78dc4
  - >-
    Linux >= bc45449b1444611d68466ae7f45f235420d79019 <
    385c7af4e3b95d0769fd211831674e83b16a2ebf
  - Linux 3.5
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:09.147'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89982'
references:
  - url: 'https://git.kernel.org/stable/c/0927153f2abf48b6cc3e5f27063a17f7a8d47f38'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2b3b06cb709c4bf75a3fe3da3a0ca368ee3b40e5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/385c7af4e3b95d0769fd211831674e83b16a2ebf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4c9bc46a2a4afb7a11c48d33bdf19febab431015'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4f42f70afd2447f3c82ca69d1e03466a75348ba9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/694e7e6edf249723ca7d3ef77c2ca1badfc78dc4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b580f062b24c4eef562f08f210c028adb34ef14e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dd2c1e6747b17b24ecddd48a7bb6bb964c2793d1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89982.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89982'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2535237'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89982'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89982'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89982.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-16T10:53:53.954Z'
epss: 0.00216
epssPercentile: 0.12009
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-772
---

## Overview

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

i2c: mux: Fix channel node leak on adapter add failure

i2c_mux_add_adapter() takes a reference to the Device Tree channel node
before registering the new adapter. If adapter registration fails, the
error path frees the private data without dropping that reference.

Release the channel node before freeing the private data.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89982.json)