{"id":"CVE-2014-4171","details":"mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction between range notification and hole punching, which allows local users to cause a denial of service (i_mutex hold) by using the mmap system call to access a hole, as demonstrated by interfering with intended shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or (2) an FALLOC_FL_PUNCH_HOLE fallocate call.","modified":"2026-01-27T04:12:47.664042Z","published":"2014-06-23T11:21:20Z","withdrawn":"2026-01-27T04:12:47.664042Z","related":["MGASA-2014-0316","MGASA-2014-0318","MGASA-2014-0330","MGASA-2014-0331","MGASA-2014-0332","MGASA-2014-0336","MGASA-2014-0337","MGASA-2015-0077","SUSE-RU-2015:0621-1","SUSE-SU-2015:0581-1","SUSE-SU-2015:0736-1","SUSE-SU-2015:1174-1","SUSE-SU-2015:1376-1"],"references":[{"type":"ARTICLE","url":"http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.html"},{"type":"ARTICLE","url":"http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00007.html"},{"type":"ARTICLE","url":"http://marc.info/?l=linux-mm-commits&m=140303745420549&w=2"},{"type":"ADVISORY","url":"http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-its-punched.patch"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2014-1318.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2015-0102.html"},{"type":"ADVISORY","url":"http://secunia.com/advisories/59777"},{"type":"ADVISORY","url":"http://secunia.com/advisories/60564"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2014/06/18/11"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/68157"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1030450"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2334-1"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-2335-1"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1111180"}],"schema_version":"1.7.3"}