---
id: CVE-2026-89609
title: 'ecryptfs: hold msg ctx list lock when cleaning daemon queue'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ecryptfs: hold msg ctx list lock when cleaning daemon queue

  ecryptfs_exorcise_daemon() drops queued messages from a dying daemon
  without holding ecryptfs_msg_ctx_lists…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-820
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    64d8998e36cfd2bb7114f3af0aa51c5a559a39b3
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    4d50b8aea11ad9594c8704a4c647e11311ab7b19
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    956541efd125a10442f9514668bc5c852702c93b
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    7e48afafe7abc275f7b6916613bb18b821e7d94a
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    0d9636ecba34bd553ecf19049f7705505aea62fd
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    4c02acbe0a2692ca9991c51e62bbe6d6b59dac31
  - >-
    Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 <
    779972513c2fa8c7938e54976f686091dafff22f
  - Linux 2.6.26
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:49:41.609Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89609'
references:
  - 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'
  - 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
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00176
epssPercentile: 0.07081
scores:
  cna: 7.8
  vendor: 7
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

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

ecryptfs: hold msg ctx list lock when cleaning daemon queue

ecryptfs_exorcise_daemon() drops queued messages from a dying daemon
without holding ecryptfs_msg_ctx_lists_mux, but
ecryptfs_msg_ctx_alloc_to_free() requires that lock.

Take the list lock while moving the queued contexts back to the free
list to avoid racing with other global msg ctx list users.

## Affected

- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 64d8998e36cfd2bb7114f3af0aa51c5a559a39b3`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 4d50b8aea11ad9594c8704a4c647e11311ab7b19`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 956541efd125a10442f9514668bc5c852702c93b`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < ec1627bcb5b51ddd46b1ef27a9d5a9834abb0a6a`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 7e48afafe7abc275f7b6916613bb18b821e7d94a`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 0d9636ecba34bd553ecf19049f7705505aea62fd`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 4c02acbe0a2692ca9991c51e62bbe6d6b59dac31`
- `Linux >= f66e883eb6186bc43a79581b67aff7d1a69d0ff1 < 779972513c2fa8c7938e54976f686091dafff22f`
- `Linux 2.6.26`

## Remediation

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

## 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)