5.5 Medium

CVE-2026-26104 Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

Description

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.

CVSS 3.1 detail

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

Exploitable with local access to the machine, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Local
Attack complexity: Low
Privileges required: Low
Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support	Versions not published
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published

References

RHSA-2026:3476 access.redhat.com
RHSA-2026:5831 access.redhat.com
access.redhat.com access.redhat.com
RHBZ#2433717 bugzilla.redhat.com
github.com github.com

Timeline

Published February 25, 2026
Last modified November 5, 2026

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