{"id":"CVE-2014-9717","details":"fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.","modified":"2026-04-10T03:44:54.212691Z","published":"2016-05-02T10:59:06Z","related":["SUSE-SU-2016:1690-1","SUSE-SU-2016:1696-1","SUSE-SU-2016:1937-1"],"references":[{"type":"ADVISORY","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce07d891a0891d3c0d0c2d73d577490486b809e1"},{"type":"ADVISORY","url":"https://github.com/torvalds/linux/commit/ce07d891a0891d3c0d0c2d73d577490486b809e1"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1226751"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html"},{"type":"WEB","url":"http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2015/04/17/4"},{"type":"WEB","url":"http://www.securityfocus.com/bid/74226"},{"type":"WEB","url":"http://www.spinics.net/lists/linux-containers/msg30786.html"},{"type":"WEB","url":"https://groups.google.com/forum/message/raw?msg=linux.kernel/HnegnbXk0Vs/RClojwJzAFEJ"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N"}]}