---
id: "CVE-2026-114038"
kind: "vulnerability"
aliases: ["CVE-2026-114038"]
title: "device-mapper-multipath: trailing percent in command leaks daemon memory"
severity: "medium"
cvss: 5.1
epss: 0.00116
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["device-mapper-multipath", "infrastructure", "linux", "multipath-tools", "self-hosted"]
not_affected_if: ["no-local-users", "no-multipath-daemon"]
published_at: "2026-10-21T01:17:26+00:00"
first_seen_at: "2026-10-23T21:57:27+00:00"
updated_at: "2026-10-25T04:29:00+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114038", "first_seen_at": "2026-10-23T21:57:27+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114038", "first_seen_at": "2026-10-24T13:15:55+00:00"}]
---

# device-mapper-multipath: trailing percent in command leaks daemon memory

A local user who sends a command ending in a trailing percent character to the multipath daemon can trigger an out-of-bounds read. The attacker can expose unintended daemon memory or crash the daemon.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed version with `multipath -h` or your package manager (for example `rpm -q device-mapper-multipath` or `dpkg -l multipath-tools`)
- Compare the result against the fixed versions listed by the vendor: unknown

## Fix

- Update device-mapper-multipath to a fixed release from your distribution: unknown
- Restrict local access to the multipath daemon socket until patched: unknown

## Timeline

- 2026-10-23T21:57:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114038
- 2026-10-24T13:15:55+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114038

## From the sources

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).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_