{"id":"DEBIAN-CVE-2026-111581","details":"A flaw was found in libblockdev. The bd_fs_ntfs_set_label() and bd_fs_vfat_set_label() functions pass caller-supplied label values as bare positional arguments to the ntfslabel and fatlabel utilities without end-of-options separators or input validation for values beginning with a dash. This allows a label starting with '-' to be interpreted as a command-line flag by the spawned tool, potentially bypassing safety checks or causing unintended operations. This is reachable by unprivileged local users through the udisks2 Filesystem.SetLabel() D-Bus method without administrator authentication.","modified":"2026-10-17T12:00:06.781897206Z","published":"2026-10-16T16:17:04.680Z","upstream":["CVE-2026-111581"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-111581"}],"affected":[{"package":{"name":"libblockdev","ecosystem":"Debian:12","purl":"pkg:deb/debian/libblockdev?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.28-2","2.28-2+deb12u1","3.0-1","3.0-2","3.0.1-1","3.0.1-2","3.0.2-1","3.0.2-2","3.0.2-3","3.0.3-1","3.0.4-1","3.1.0-1","3.1.1-1","3.1.1-2","3.2.0-1","3.2.0-2","3.2.1-1","3.3.0-1","3.3.0-2","3.3.0-2.1","3.3.1-1","3.3.1-2","3.3.1-3","3.4.0-1","3.4.0-2","3.5.0-1","3.5.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-111581.json"}},{"package":{"name":"libblockdev","ecosystem":"Debian:13","purl":"pkg:deb/debian/libblockdev?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-2.1","3.3.1-1","3.3.1-2","3.3.1-3","3.4.0-1","3.4.0-2","3.5.0-1","3.5.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-111581.json"}},{"package":{"name":"libblockdev","ecosystem":"Debian:14","purl":"pkg:deb/debian/libblockdev?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-2.1","3.3.1-1","3.3.1-2","3.3.1-3","3.4.0-1","3.4.0-2","3.5.0-1","3.5.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-111581.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:L/A:N"}]}