{"id":"CVE-2018-20784","details":"In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.","modified":"2026-03-15T22:19:56.395232Z","published":"2019-02-22T15:29:00.237Z","related":["SUSE-SU-2022:2077-1","SUSE-SU-2022:2082-1","SUSE-SU-2023:2805-1","SUSE-SU-2023:3324-1"],"references":[{"type":"ADVISORY","url":"https://usn.ubuntu.com/4118-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4211-2/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1959"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1971"},{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4115-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4211-1/"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0"},{"type":"FIX","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20784.json","unresolved_ranges":[{"events":[{"introduced":"4.13"},{"fixed":"4.14.93"}]},{"events":[{"introduced":"4.19"},{"fixed":"4.19.15"}]},{"events":[{"introduced":"4.20"},{"fixed":"4.20.2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.0-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}