High severity · published Feb 25, 2026
CVE-2026-26103
Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api
7.1
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 0% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat
All versions, or not specified · source: vendor, CISA
EL
Enterprise Linux · Redhat
10.0 · source: NVD
UD
Udisks · Freedesktop
2.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26103
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26103
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:3476
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:5831
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-26103
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2433719
github.com
https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26103.json
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