{"id":"CVE-2019-9213","details":"In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.","modified":"2026-03-15T22:29:53.259862Z","published":"2019-03-05T22:29:00.240Z","related":["MGASA-2019-0120","MGASA-2019-0171","MGASA-2019-0172","SUSE-SU-2019:0645-1","SUSE-SU-2019:0672-1","SUSE-SU-2019:0683-1","SUSE-SU-2019:0709-1","SUSE-SU-2019:0722-1","SUSE-SU-2019:0726-1","SUSE-SU-2019:0740-1","SUSE-SU-2019:0745-1","SUSE-SU-2019:0754-1","SUSE-SU-2019:0761-1","SUSE-SU-2019:0765-1","SUSE-SU-2019:0767-1","SUSE-SU-2019:0784-1","SUSE-SU-2019:0785-1","SUSE-SU-2019:0801-1","SUSE-SU-2019:0828-1","SUSE-SU-2019:0845-1","SUSE-SU-2019:0901-1","SUSE-SU-2019:1289-1","SUSE-SU-2019:14051-1","openSUSE-SU-2019:1193-1"],"references":[{"type":"ADVISORY","url":"https://usn.ubuntu.com/3931-1/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/107296"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3932-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3933-1/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0831"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1479"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3930-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3930-2/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3931-2/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3932-2/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3933-2/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1480"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html"},{"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":"FIX","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105"},{"type":"FIX","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1"},{"type":"FIX","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162"},{"type":"FIX","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1"},{"type":"FIX","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27"},{"type":"EVIDENCE","url":"https://www.exploit-db.com/exploits/46502/"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html"},{"type":"EVIDENCE","url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1792"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9213.json","unresolved_ranges":[{"events":[{"introduced":"4.9"},{"fixed":"4.9.162"}]},{"events":[{"introduced":"4.14"},{"fixed":"4.14.105"}]},{"events":[{"introduced":"4.19"},{"fixed":"4.19.27"}]},{"events":[{"introduced":"4.20"},{"fixed":"4.20.14"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"15.0"}]},{"events":[{"introduced":"0"},{"last_affected":"42.3"}]},{"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":"18.10"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}