{"id":"CVE-2014-8989","details":"The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a \"negative groups\" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.","modified":"2026-04-16T06:24:48.571770974Z","published":"2014-11-30T01:59:07Z","references":[{"type":"ADVISORY","url":"http://www.mandriva.com/security/advisories?name=MDVSA-2015:058"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2515-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2516-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2517-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2518-1"},{"type":"EVIDENCE","url":"http://thread.gmane.org/gmane.linux.man/7385/"},{"type":"WEB","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html"},{"type":"WEB","url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2014/11/20/4"},{"type":"WEB","url":"http://www.securityfocus.com/bid/71154"}],"schema_version":"1.7.5"}