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.
Affected products
redhat: enterprise linux; freedesktop: udisks
References10
- access.redhat.com/security/cve/CVE-2026-26103 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2433719 Issue TrackingVendor Advisory
- access.redhat.com/security/cve/CVE-2026-26103 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2433719 Issue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:3476
- access.redhat.com/errata/RHSA-2026:5831
- github.com/storaged-project/udisks/security/advisories/GHSA-c75…
- access.redhat.com/errata/RHSA-2026:3476
- access.redhat.com/errata/RHSA-2026:5831
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26103…
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - EPSS — exploit probability
- 0% percentile: 0 · as of 12 November 2026
- CWE
- CWE-862
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