CVE-2026-26103
HIGH severity · CVSS 7.1 · Missing authorization
7.1CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://access.redhat.com/security/cve/CVE-2026-26103Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2433719Advisory
- https://access.redhat.com/errata/RHSA-2026:3476
- https://access.redhat.com/errata/RHSA-2026:5831
- https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm