---
id: CVE-2026-111581
title: A flaw was found in libblockdev
summary: >-
  A flaw was found in libblockdev. The bd_fs_ntfs_set_label() and
  bd_fs_vfat_set_label() functions pass caller-supplied label values as bare
  positional arguments to the ntfslabel and fatlabel utilities without
  end-of-options separators or …
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-88
vendor: Red Hat
product: Red Hat Enterprise Linux 7
affected:
  - enterprise_linux 10
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:23:18.623'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111581'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-111581'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554104'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111581.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-111581'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111581'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00126
epssPercentile: 0.02336
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T16:32:08.637542Z'
ingestedAt: '2026-10-16T18:43:08.841Z'
---

## Overview

A flaw was found in libblockdev. The bd_fs_ntfs_set_label() and bd_fs_vfat_set_label() functions pass caller-supplied label values as bare positional arguments to the ntfslabel and fatlabel utilities without end-of-options separators or input validation for values beginning with a dash. This allows a label starting with '-' to be interpreted as a command-line flag by the spawned tool, potentially bypassing safety checks or causing unintended operations. This is reachable by unprivileged local users through the udisks2 Filesystem.SetLabel() D-Bus method without administrator authentication.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111581.json)