{"id":"CVE-2016-2854","details":"The aufs module for the Linux kernel 3.x and 4.x does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.","modified":"2026-03-15T14:18:27.541993Z","published":"2016-05-02T10:59:34.533Z","references":[{"type":"ADVISORY","url":"https://sourceforge.net/p/aufs/mailman/message/34864744/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/96838"},{"type":"EVIDENCE","url":"http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2016/02/24/9"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-2854.json","unresolved_ranges":[{"events":[{"introduced":"3.0.0"},{"last_affected":"3.19.8"}]},{"events":[{"introduced":"4.0.0"},{"last_affected":"4.20.15"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}