{"id":"CVE-2017-18344","details":"The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent-\u003esigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).","modified":"2026-04-16T06:15:52.852556902Z","published":"2018-07-26T19:29:00.427Z","related":["SUSE-SU-2018:2222-1","SUSE-SU-2018:2223-1","SUSE-SU-2018:2328-1","SUSE-SU-2018:2344-1","SUSE-SU-2018:2344-2","SUSE-SU-2018:2374-1","SUSE-SU-2018:2387-1","SUSE-SU-2018:2391-1","SUSE-SU-2018:2413-1","SUSE-SU-2018:2416-1","SUSE-SU-2018:2472-1","SUSE-SU-2018:2474-1","SUSE-SU-2018:2596-1","SUSE-SU-2023:3333-1"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3590"},{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3742-1/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:2948"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3083"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3459"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3540"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3586"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3742-2/"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1041414"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3591"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/104909"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3096"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe"},{"type":"EVIDENCE","url":"https://www.exploit-db.com/exploits/45175/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/torvalds/linux","events":[{"introduced":"0"},{"fixed":"cef31d9af908243421258f1df35a4a644604efbe"}]},{"type":"GIT","repo":"https://github.com/torvalds/linux","events":[{"introduced":"0"},{"fixed":"cef31d9af908243421258f1df35a4a644604efbe"}]}],"versions":["v2.6.12-rc2","v2.6.12-rc3","v2.6.12-rc4","v2.6.13","v2.6.13-rc1","v2.6.13-rc2","v2.6.13-rc3","v2.6.13-rc4","v2.6.13-rc5","v2.6.13-rc6","v2.6.13-rc7","v2.6.14-rc1","v2.6.14-rc2","v2.6.14-rc3","v2.6.15-rc1","v2.6.15-rc2","v2.6.15-rc4","v2.6.15-rc5","v2.6.15-rc7","v2.6.16","v2.6.16-rc1","v2.6.16-rc2","v2.6.16-rc3","v2.6.16-rc4","v2.6.16-rc5","v2.6.16-rc6","v2.6.17","v2.6.17-rc1","v2.6.17-rc2","v2.6.17-rc3","v2.6.17-rc4","v2.6.17-rc5","v2.6.17-rc6","v2.6.18","v2.6.18-rc1","v2.6.18-rc2","v2.6.18-rc3","v2.6.18-rc5","v2.6.18-rc6","v2.6.19-rc1","v2.6.19-rc2","v2.6.20-rc1","v2.6.20-rc2","v2.6.20-rc3","v2.6.20-rc4","v2.6.20-rc5","v2.6.20-rc6","v2.6.20-rc7","v2.6.21","v2.6.21-rc1","v2.6.21-rc2","v2.6.21-rc3","v2.6.21-rc4","v2.6.21-rc5","v2.6.21-rc6","v2.6.21-rc7","v2.6.22","v2.6.22-rc1","v2.6.22-rc2","v2.6.22-rc3","v2.6.22-rc4","v2.6.22-rc5","v2.6.22-rc6","v2.6.22-rc7","v2.6.23","v2.6.23-rc1","v2.6.23-rc2","v2.6.23-rc3","v2.6.23-rc4","v2.6.23-rc5","v2.6.23-rc6","v2.6.23-rc7","v2.6.23-rc8","v2.6.23-rc9","v2.6.24","v2.6.24-rc1","v2.6.24-rc2","v2.6.24-rc3","v2.6.24-rc4","v2.6.24-rc5","v2.6.24-rc6","v2.6.24-rc7","v2.6.24-rc8","v2.6.25","v2.6.25-rc1","v2.6.25-rc2","v2.6.25-rc3","v2.6.25-rc4","v2.6.25-rc5","v2.6.25-rc6","v2.6.25-rc7","v2.6.25-rc8","v2.6.25-rc9","v2.6.26","v2.6.26-rc1","v2.6.26-rc2","v2.6.26-rc3","v2.6.26-rc4","v2.6.26-rc5","v2.6.26-rc6","v2.6.26-rc7","v2.6.26-rc8","v2.6.26-rc9","v2.6.27","v2.6.27-rc1","v2.6.27-rc2","v2.6.27-rc3","v2.6.27-rc4","v2.6.27-rc5","v2.6.27-rc6","v2.6.27-rc7","v2.6.27-rc8","v2.6.27-rc9","v2.6.28","v2.6.28-rc1","v2.6.28-rc2","v2.6.28-rc3","v2.6.28-rc4","v2.6.28-rc5","v2.6.28-rc6","v2.6.28-rc7","v2.6.28-rc8","v2.6.28-rc9","v2.6.29","v2.6.29-rc1","v2.6.29-rc2","v2.6.29-rc3","v2.6.29-rc4","v2.6.29-rc5","v2.6.29-rc6","v2.6.29-rc7","v2.6.29-rc8","v2.6.30","v2.6.30-rc1","v2.6.30-rc2","v2.6.30-rc3","v2.6.30-rc4","v2.6.30-rc5","v2.6.30-rc6","v2.6.30-rc7","v2.6.30-rc8","v2.6.31","v2.6.31-rc1","v2.6.31-rc2","v2.6.31-rc3","v2.6.31-rc4","v2.6.31-rc5","v2.6.31-rc6","v2.6.31-rc7","v2.6.31-rc8","v2.6.31-rc9","v2.6.32","v2.6.32-rc1","v2.6.32-rc2","v2.6.32-rc3","v2.6.32-rc4","v2.6.32-rc5","v2.6.32-rc6","v2.6.32-rc7","v2.6.32-rc8","v2.6.33","v2.6.33-rc1","v2.6.33-rc2","v2.6.33-rc3","v2.6.33-rc4","v2.6.33-rc5","v2.6.33-rc6","v2.6.33-rc7","v2.6.33-rc8","v2.6.34","v2.6.34-rc1","v2.6.34-rc2","v2.6.34-rc3","v2.6.34-rc4","v2.6.34-rc5","v2.6.34-rc6","v2.6.34-rc7","v2.6.35","v2.6.35-rc1","v2.6.35-rc2","v2.6.35-rc3","v2.6.35-rc4","v2.6.35-rc5","v2.6.35-rc6","v2.6.36","v2.6.36-rc1","v2.6.36-rc2","v2.6.36-rc3","v2.6.36-rc4","v2.6.36-rc5","v2.6.36-rc6","v2.6.36-rc7","v2.6.36-rc8","v2.6.37","v2.6.37-rc1","v2.6.37-rc2","v2.6.37-rc3","v2.6.37-rc4","v2.6.37-rc5","v2.6.37-rc6","v2.6.37-rc7","v2.6.37-rc8","v2.6.38","v2.6.38-rc1","v2.6.38-rc2","v2.6.38-rc3","v2.6.38-rc4","v2.6.38-rc5","v2.6.38-rc6","v2.6.38-rc7","v2.6.38-rc8","v2.6.39","v2.6.39-rc1","v2.6.39-rc2","v2.6.39-rc3","v2.6.39-rc4","v2.6.39-rc5","v2.6.39-rc6","v2.6.39-rc7","v3.0","v3.0-rc1","v3.0-rc2","v3.0-rc3","v3.0-rc4","v3.0-rc5","v3.0-rc6","v3.0-rc7","v3.1","v3.1-rc1","v3.1-rc10","v3.1-rc2","v3.1-rc3","v3.1-rc4","v3.1-rc5","v3.1-rc6","v3.1-rc7","v3.1-rc8","v3.1-rc9","v3.10","v3.10-rc1","v3.10-rc2","v3.10-rc3","v3.10-rc4","v3.10-rc5","v3.10-rc6","v3.10-rc7","v3.11","v3.11-rc1","v3.11-rc2","v3.11-rc3","v3.11-rc4","v3.11-rc5","v3.11-rc6","v3.11-rc7","v3.12","v3.12-rc1","v3.12-rc2","v3.12-rc3","v3.12-rc4","v3.12-rc5","v3.12-rc6","v3.12-rc7","v3.13","v3.13-rc1","v3.13-rc2","v3.13-rc3","v3.13-rc4","v3.13-rc5","v3.13-rc6","v3.13-rc7","v3.13-rc8","v3.14","v3.14-rc1","v3.14-rc2","v3.14-rc3","v3.14-rc4","v3.14-rc5","v3.14-rc6","v3.14-rc7","v3.14-rc8","v3.15","v3.15-rc1","v3.15-rc2","v3.15-rc3","v3.15-rc4","v3.15-rc5","v3.15-rc6","v3.15-rc7","v3.15-rc8","v3.16","v3.16-rc1","v3.16-rc2","v3.16-rc3","v3.16-rc4","v3.16-rc5","v3.16-rc6","v3.16-rc7","v3.17","v3.17-rc1","v3.17-rc2","v3.17-rc3","v3.17-rc4","v3.17-rc5","v3.17-rc6","v3.17-rc7","v3.18","v3.18-rc1","v3.18-rc2","v3.18-rc3","v3.18-rc4","v3.18-rc5","v3.18-rc6","v3.18-rc7","v3.19","v3.19-rc1","v3.19-rc2","v3.19-rc3","v3.19-rc4","v3.19-rc5","v3.19-rc6","v3.19-rc7","v3.2","v3.2-rc1","v3.2-rc2","v3.2-rc3","v3.2-rc4","v3.2-rc5","v3.2-rc6","v3.2-rc7","v3.3","v3.3-rc1","v3.3-rc2","v3.3-rc3","v3.3-rc4","v3.3-rc5","v3.3-rc6","v3.3-rc7","v3.4","v3.4-rc1","v3.4-rc2","v3.4-rc3","v3.4-rc4","v3.4-rc5","v3.4-rc6","v3.4-rc7","v3.5","v3.5-rc1","v3.5-rc2","v3.5-rc3","v3.5-rc4","v3.5-rc5","v3.5-rc6","v3.5-rc7","v3.6","v3.6-rc1","v3.6-rc2","v3.6-rc3","v3.6-rc4","v3.6-rc5","v3.6-rc6","v3.6-rc7","v3.7","v3.7-rc1","v3.7-rc2","v3.7-rc3","v3.7-rc4","v3.7-rc5","v3.7-rc6","v3.7-rc7","v3.7-rc8","v3.8","v3.8-rc1","v3.8-rc2","v3.8-rc3","v3.8-rc4","v3.8-rc5","v3.8-rc6","v3.8-rc7","v3.9","v3.9-rc1","v3.9-rc2","v3.9-rc3","v3.9-rc4","v3.9-rc5","v3.9-rc6","v3.9-rc7","v3.9-rc8","v4.0","v4.0-rc1","v4.0-rc2","v4.0-rc3","v4.0-rc4","v4.0-rc5","v4.0-rc6","v4.0-rc7","v4.1","v4.1-rc1","v4.1-rc2","v4.1-rc3","v4.1-rc4","v4.1-rc5","v4.1-rc6","v4.1-rc7","v4.1-rc8","v4.10","v4.10-rc1","v4.10-rc2","v4.10-rc3","v4.10-rc4","v4.10-rc5","v4.10-rc6","v4.10-rc7","v4.10-rc8","v4.11","v4.11-rc1","v4.11-rc2","v4.11-rc3","v4.11-rc4","v4.11-rc5","v4.11-rc6","v4.11-rc7","v4.11-rc8","v4.12","v4.12-rc1","v4.12-rc2","v4.12-rc3","v4.12-rc4","v4.12-rc5","v4.12-rc6","v4.12-rc7","v4.13","v4.13-rc1","v4.13-rc2","v4.13-rc3","v4.13-rc4","v4.13-rc5","v4.13-rc6","v4.13-rc7","v4.14","v4.14-rc1","v4.14-rc2","v4.14-rc3","v4.14-rc4","v4.14-rc5","v4.14-rc6","v4.14-rc7","v4.14-rc8","v4.15-rc1","v4.15-rc2","v4.15-rc3","v4.2","v4.2-rc1","v4.2-rc2","v4.2-rc3","v4.2-rc4","v4.2-rc5","v4.2-rc6","v4.2-rc7","v4.2-rc8","v4.3","v4.3-rc1","v4.3-rc2","v4.3-rc3","v4.3-rc4","v4.3-rc5","v4.3-rc6","v4.3-rc7","v4.4","v4.4-rc1","v4.4-rc2","v4.4-rc3","v4.4-rc4","v4.4-rc5","v4.4-rc6","v4.4-rc7","v4.4-rc8","v4.5","v4.5-rc1","v4.5-rc2","v4.5-rc3","v4.5-rc4","v4.5-rc5","v4.5-rc6","v4.5-rc7","v4.6","v4.6-rc1","v4.6-rc2","v4.6-rc3","v4.6-rc4","v4.6-rc5","v4.6-rc6","v4.6-rc7","v4.7","v4.7-rc1","v4.7-rc2","v4.7-rc3","v4.7-rc4","v4.7-rc5","v4.7-rc6","v4.7-rc7","v4.8","v4.8-rc1","v4.8-rc2","v4.8-rc3","v4.8-rc4","v4.8-rc5","v4.8-rc6","v4.8-rc7","v4.8-rc8","v4.9","v4.9-rc1","v4.9-rc2","v4.9-rc3","v4.9-rc4","v4.9-rc5","v4.9-rc6","v4.9-rc7","v4.9-rc8"],"database_specific":{"vanir_signatures_modified":"2026-04-11T04:38:01Z","vanir_signatures":[{"signature_type":"Function","signature_version":"v1","source":"https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe","target":{"file":"kernel/time/posix-timers.c","function":"common_timer_get"},"deprecated":false,"digest":{"function_hash":"91978049241427869349359769787530876705","length":722},"id":"CVE-2017-18344-37ce9602"},{"deprecated":false,"digest":{"function_hash":"115908372110247328066651298022795767701","length":778},"id":"CVE-2017-18344-60feac13","signature_type":"Function","signature_version":"v1","source":"https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe","target":{"file":"kernel/time/posix-timers.c","function":"common_timer_set"}},{"source":"https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe","target":{"file":"kernel/time/posix-timers.c"},"deprecated":false,"digest":{"line_hashes":["146197936919818065248076150557485196780","128334216374169068790596793946404006176","339925895396929344413987964858568551389","184452859644798576549248792683773494326","47655441244207130206451221386185673445","139416599320693002291691262152522043607","125379787334682308768506735496233247504","78543303975873552307974033646329052819","250857661375613309051009668468809650358","224527544721182226544730456812780003850","246857783785049624063665842306045379136","222729680264692881102965914793949564760","174582477823483378953130510082731793511","168614959044836456389374558948264401721","196126059948684577953005774779089949061","109456044838412606375161596405635895491","150987946082902909180055097630472616905","18150880662664686175948959079144583362","49531577852050146125049299696959805439","111821535592461620094399762496492622009"],"threshold":0.9},"id":"CVE-2017-18344-8abebf45","signature_type":"Line","signature_version":"v1"},{"target":{"function":"good_sigevent","file":"kernel/time/posix-timers.c"},"deprecated":false,"digest":{"length":496,"function_hash":"326937765684080479665931808154825368488"},"id":"CVE-2017-18344-d6701266","signature_type":"Function","signature_version":"v1","source":"https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe"}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18344.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.14.8"}]},{"events":[{"introduced":"0"},{"last_affected":"12.04"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"2.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.2"}]},{"events":[{"introduced":"0"},{"last_affected":"7.3"}]},{"events":[{"introduced":"0"},{"last_affected":"7.4"}]},{"events":[{"introduced":"0"},{"last_affected":"7.3"}]},{"events":[{"introduced":"0"},{"last_affected":"7.5"}]},{"events":[{"introduced":"0"},{"last_affected":"7.2"}]},{"events":[{"introduced":"0"},{"last_affected":"7.3"}]},{"events":[{"introduced":"0"},{"last_affected":"7.4"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"fixed":"4.14.8"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}