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Vulnerability record · CVE-2026-26103 · published 25 February 2026

CVE-2026-26103: Redhat enterprise linux missing authorization vulnerability

Redhat · Enterprise Linux

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.

7.1 CVSS 3.1 High EPSS 0.11% · top 99.0% CWE-862 · Missing authorization
7.1CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
15 Jul 2026Last modified by NVD

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:3476
https://access.redhat.com/errata/RHSA-2026:5831
https://access.redhat.com/security/cve/CVE-2026-26103 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2433719 Issue TrackingVendor Advisory
https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm
https://access.redhat.com/errata/RHSA-2026:3476
https://access.redhat.com/errata/RHSA-2026:5831
https://access.redhat.com/security/cve/CVE-2026-26103 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2433719 Issue TrackingVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26103.json

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Source: NIST National Vulnerability Database (record CVE-2026-26103), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.