---
id: CVE-2026-26103
title: >-
  Udisks: missing authorization check allows unprivileged users to restore luks
  headers via udisks d-bus api
summary: >-
  A flaw was found in the udisks storage management daemon that exposes a
  privileged D-Bus API for restoring LUKS encryption headers without proper
  authorization checks. The issue allows a local unprivileged user to instruct
  the root-owned…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-862
vendor: Red Hat
product: udisks2
affected:
  - udisks2 (all versions)
  - udisks2 (all versions)
  - udisks
  - udisks2
  - udisks2
  - udisks2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-02-25T21:02:55.684680Z'
published: '2026-02-25'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T22:15:30.111Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-26103'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:3476'
    label: 'RHSA-2026:3476'
  - url: 'https://access.redhat.com/errata/RHSA-2026:5831'
    label: 'RHSA-2026:5831'
  - url: 'https://access.redhat.com/security/cve/CVE-2026-26103'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2433719'
    label: RHBZ#2433719
  - url: >-
      https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm
tags:
  - cve.org
epss: 0.00082
epssPercentile: 0.00191
ingestedAt: '2026-11-05T21:36:00.638Z'
---

## Overview

A flaw was found in the udisks storage management daemon that exposes a privileged D-Bus API for restoring LUKS encryption headers without proper authorization checks. The issue allows a local unprivileged user to instruct the root-owned udisks daemon to overwrite encryption metadata on block devices. This can permanently invalidate encryption keys and render encrypted volumes inaccessible. Successful exploitation results in a denial-of-service condition through irreversible data loss.

## Affected

- `udisks2 (all versions)`
- `udisks2 (all versions)`
- `udisks`
- `udisks2`
- `udisks2`
- `udisks2`

## Remediation

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

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability.