Auth bypass in Freedesktop Udisks
CVE-2026-26103
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.
Vulnerability class: Broken Access Control
EPSS: 0.001 (0.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Freedesktop Udisks — versions 2.0.0
- Red Hat Enterprise Linux 10 — versions 0:2.10.90-6.el10_1.1
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:2.10.90-5.el10_0.2
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Redhat Enterprise_linux — versions 10.0
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
- secalert@redhat.com
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-26103?
- CVE-2026-26103 is a high-severity vulnerability in Freedesktop Udisks, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-02-25.
- How severe is CVE-2026-26103?
- High severity. CVSS v3 base score is 7.1 out of 10.