---
id: CVE-2026-89495
title: 'kernel: ocfs2: bound namelen in dlm_migrate_request_handler (CVE-2026-89495)'
summary: >-
  A flaw was found in ocfs2 in the Linux kernel. A malicious or compromised node
  within a Distributed Lock Manager (DLM) cluster can send specially crafted
  messages with unchecked length fields. This can lead to a heap out-of-bounds
  write, p…
severity: medium
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-120
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T21:28:38+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89495.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89495.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89495'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532097'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89495'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89495'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89495.mbox
  - url: 'https://git.kernel.org/stable/c/e1288865b8ceac0dcd1009ecba43de961f13d5bd'
  - url: 'https://git.kernel.org/stable/c/aabc5d8388e6f8826345f0073455dbcaaaa6491d'
  - url: 'https://git.kernel.org/stable/c/006c96ea488eca2ef5155ec76038e0a4dbf65f0a'
  - url: 'https://git.kernel.org/stable/c/24989909d3413b44b104102caa6661b1e424ba0f'
  - url: 'https://git.kernel.org/stable/c/f8658ee3327f73bd81c0bcd07cdeb5a8527fac98'
  - url: 'https://git.kernel.org/stable/c/de10cd3b062a5235af754925fcf49beb5a1109d4'
  - url: 'https://git.kernel.org/stable/c/2487bea2098322669f0563baff53e797486b823f'
  - url: 'https://git.kernel.org/stable/c/ea5b5609305a8437bc955a0834a530c12246d78f'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00704
epssPercentile: 0.51906
scores:
  vendor: 5.5
  cna: 9.8
ingestedAt: '2026-09-14T15:23:07.452Z'
---

## Overview

A flaw was found in ocfs2 in the Linux kernel. A malicious or compromised node within a Distributed Lock Manager (DLM) cluster can send specially crafted messages with unchecked length fields. This can lead to a heap out-of-bounds write, potentially allowing for arbitrary code execution, or an out-of-bounds read, which can cause a kernel panic and result in a Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89495.json)

**kernel: ocfs2: bound namelen in dlm_migrate_request_handler** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.