Vulnerability Report

CVE-2026-26103

Title: Unauthorized LUKS header restore in udisks

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-26103.

CWE Category CWE-862

Published Date Feb 25, 2026

Modified Date Mar 25, 2026

Exploit Status Not Found

Score 7.1 CVSS v3.1

Exploit Probability (EPSS)

0.01%

Vulnerability Summary

CVE-2026-26103: 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.

Impacted Vendors

freedesktop 1

Reference Links

https://access.redhat.com/security/cve/CVE-2026-26103 https://bugzilla.redhat.com/show_bug.cgi?id=2433719

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.1

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns