CVE-2026-26104
Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api
- State
- Published
- Severity
- 5.5 Medium
- Published
- Feb 25, 2026
- Updated
- Mar 25, 2026
- Reserved
- Feb 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | redhat |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 10Red Hat |
|
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat |
|
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat |
References
- RHSA-2026:3476vendor-advisory
- RHSA-2026:5831vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-26104vdb-entry
- RHBZ#2433717issue-tracking
- https://github.com/storaged-project/udisks/security/advisories/GHSA-fcvx-497g-6xmw
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