CVE-2026-26103
Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api
- State
- Published
- Severity
- 7.1 High
- Published
- Feb 25, 2026
- Updated
- Jul 15, 2026
- Reserved
- Feb 11, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H | redhat |
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H | redhat-SADP |
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-2026-26103vdb-entry
- RHBZ#2433719issue-tracking
- https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26103.json
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