CVE-2026-26104

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate. Exploitation requires local access but no authentication or user interaction. Successful exploitation enables unauthorized disclosure of LUKS encryption metadata, which may assist offline password-cracking or cryptographic analysis attacks. The vulnerability is caused by a missing authorization check on a privileged D-Bus method that performs sensitive read operations.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

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.