{"id":"CVE-2026-26103","summary":"Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api","details":"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.","aliases":["GHSA-c75h-phf8-ccjm"],"modified":"2026-08-12T03:51:26.297460237Z","published":"2026-02-25T10:31:50.913Z","related":["ALSA-2026:3476","openSUSE-SU-2026:10273-1"],"database_specific":{"cna_assigner":"redhat","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26103.json"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26103.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3476"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:5831"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-26103"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26103.json"},{"type":"ADVISORY","url":"https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26103"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433719"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/storaged-project/udisks","events":[{"introduced":"414618e6c61f2a207f7e40830632ff331df245c9"},{"last_affected":"414618e6c61f2a207f7e40830632ff331df245c9"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:freedesktop:udisks:2.0.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.0.0"}]}}],"versions":["2.0.0","storaged-2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26103.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"}]}