---
id: CVE-2026-53615
title: util-linux is a random collection of Linux utilities
summary: >-
  util-linux is a random collection of Linux utilities. Before util-linux
  2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an
  extended-partition start sector with 32-bit addition and does not apply the
  extended-ar…
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H'
cwe:
  - CWE-190
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:17:46.070'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53615'
references:
  - url: >-
      https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623
    label: security-advisories@github.com
  - url: >-
      https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31
    label: security-advisories@github.com
  - url: >-
      https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af
    label: security-advisories@github.com
  - url: 'https://github.com/util-linux/util-linux/releases/tag/v2.41.4'
    label: security-advisories@github.com
  - url: >-
      https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-14T16:40:32.125Z'
---

## Overview

util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.

## Remediation

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