---
id: CVE-2026-114038
title: >-
  Device-mapper-multipath: device-mapper-multipath: information disclosure via
  malformed format string
summary: >-
  A flaw was found in device-mapper-multipath. A local user can trigger an
  out-of-bounds read by sending a command with a format string ending in a
  trailing percent character to the multipath daemon. This issue can allow the
  user to expose…
severity: medium
cvss: 5.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-125
vendor: Red Hat
product: device-mapper-multipath
affected:
  - device-mapper-multipath (all versions)
  - device-mapper-multipath
  - device-mapper-multipath (all versions)
  - device-mapper-multipath (all versions)
  - device-mapper-multipath (all versions)
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T00:26:49.238Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114038'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-114038'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2469787'
    label: RHBZ#2469787
tags:
  - cve.org
ingestedAt: '2026-10-21T01:37:08.051Z'
---

## Overview

A flaw was found in device-mapper-multipath. A local user can trigger an out-of-bounds read by sending a command with a format string ending in a trailing percent character to the multipath daemon. This issue can allow the user to expose unintended daemon memory, leading to information disclosure, or cause the daemon to crash, resulting in a Denial of Service (DoS).

## Affected

- `device-mapper-multipath (all versions)`
- `device-mapper-multipath`
- `device-mapper-multipath (all versions)`
- `device-mapper-multipath (all versions)`
- `device-mapper-multipath (all versions)`
- `openshift/ose-rhel-coreos-8 (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`

## Remediation

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