{"id":"CVE-2018-12896","details":"An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.","modified":"2026-03-15T21:45:02.439415Z","published":"2018-07-02T17:29:00.660Z","related":["SUSE-SU-2018:2775-1","SUSE-SU-2018:2776-1","SUSE-SU-2018:2858-1","SUSE-SU-2018:2862-1","SUSE-SU-2018:2879-1","SUSE-SU-2018:2908-1","SUSE-SU-2018:2908-2","SUSE-SU-2018:2980-1","SUSE-SU-2018:2981-1","SUSE-SU-2018:3083-1","SUSE-SU-2018:3084-1","SUSE-SU-2018:3088-1","SUSE-SU-2018:3618-1","SUSE-SU-2018:3961-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3847-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3847-3/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3848-2/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3849-2/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3847-2/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3848-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3849-1/"},{"type":"REPORT","url":"https://bugzilla.kernel.org/show_bug.cgi?id=200189"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76"},{"type":"EVIDENCE","url":"https://github.com/lcytxw/bug_repro/tree/master/bug_200189"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"4.17.3"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"12.04"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12896.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}