---
id: CVE-2026-89609
title: >-
  kernel: ecryptfs: hold msg ctx list lock when cleaning daemon queue
  (CVE-2026-89609)
summary: >-
  A flaw was found in the eCryptfs component of the Linux kernel. A race
  condition occurs during the cleanup of the daemon message queue because a
  required lock is not held. This can lead to unpredictable system behavior or
  instability due t…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-820
vendor: Red Hat
product: Red Hat Enterprise Linux 6
affected:
  - enterprise_linux 6
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T22:15:29+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89609.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89609.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89609'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532182'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89609'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89609'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89609.mbox
  - url: 'https://git.kernel.org/stable/c/64d8998e36cfd2bb7114f3af0aa51c5a559a39b3'
  - url: 'https://git.kernel.org/stable/c/4d50b8aea11ad9594c8704a4c647e11311ab7b19'
  - url: 'https://git.kernel.org/stable/c/956541efd125a10442f9514668bc5c852702c93b'
  - url: 'https://git.kernel.org/stable/c/ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a'
  - url: 'https://git.kernel.org/stable/c/7e48afafe7abc275f7b6916613bb18b821e7d94a'
  - url: 'https://git.kernel.org/stable/c/0d9636ecba34bd553ecf19049f7705505aea62fd'
  - url: 'https://git.kernel.org/stable/c/4c02acbe0a2692ca9991c51e62bbe6d6b59dac31'
  - url: 'https://git.kernel.org/stable/c/779972513c2fa8c7938e54976f686091dafff22f'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00176
epssPercentile: 0.07375
scores:
  vendor: 7
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

A flaw was found in the eCryptfs component of the Linux kernel. A race condition occurs during the cleanup of the daemon message queue because a required lock is not held. This can lead to unpredictable system behavior or instability due to concurrent access to shared message context lists.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89609.json)

**kernel: ecryptfs: hold msg ctx list lock when cleaning daemon queue** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.

Affected:

- Red Hat Enterprise Linux 6

No fix planned:

- Red Hat Enterprise Linux 6

Not affected:

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

## Remediation

Out of support scope