{"id":"CVE-2026-26103","title":"Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api","summary":"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…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cvssSource":"cna","cwe":["CWE-862"],"vendor":"Red Hat","product":"udisks2","affected":["udisks2 (all versions)","udisks2 (all versions)","udisks","udisks2","udisks2","udisks2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-02-25T21:02:55.684680Z"},"published":"2026-02-25","updated":"2026-11-04","sourceUpdated":"2026-11-04T22:15:30.111Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-26103","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:3476","label":"RHSA-2026:3476"},{"url":"https://access.redhat.com/errata/RHSA-2026:5831","label":"RHSA-2026:5831"},{"url":"https://access.redhat.com/security/cve/CVE-2026-26103"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433719","label":"RHBZ#2433719"},{"url":"https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm"}],"tags":["cve.org"],"epss":0.00082,"epssPercentile":0.00191,"ingestedAt":"2026-11-05T21:36:00.638Z","slug":"CVE-2026-26103","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `udisks2 (all versions)`\n- `udisks2 (all versions)`\n- `udisks`\n- `udisks2`\n- `udisks2`\n- `udisks2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}