CVE-2026-26104 Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api
Unprivileged users can bypass authorization checks to read and export LUKS encryption headers via the udisks D-Bus API, compromising encrypted volume confidentiality.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-26104?
CVE-2026-26104 is a medium-severity missing authorization vulnerability in Redhat Enterprise Linux, published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-26104?
It affects 2 products.
Products include Freedesktop Udisks, Redhat Enterprise Linux.
How do I fix CVE-2026-26104?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-26104 being exploited?
There is no known exploitation of CVE-2026-26104 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
Sources
Also known as DEBIAN-CVE-2026-26104, GHSA-fcvx-497g-6xmw, GHSA-hjgq-ff5j-5v2m.