CVE-2026-26103 HIGH

CVE-2026-26103: Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-862 · Missing authorization
Published February 25, 2026
Last update June 30, 2026

CVSS base score

7.1/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 25, 2026 CVE published
June 30, 2026 Record updated

Related vulnerabilities

04Related CVE