{"id":"CVE-2018-20856","details":"An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.","modified":"2026-03-15T22:19:55.340618Z","published":"2019-07-26T05:15:10.517Z","related":["SUSE-SU-2019:2263-1","SUSE-SU-2019:2299-1","SUSE-SU-2019:3228-1","SUSE-SU-2019:3232-1","SUSE-SU-2019:3252-1","SUSE-SU-2019:3258-1","SUSE-SU-2019:3260-1","SUSE-SU-2019:3261-1"],"references":[{"type":"WEB","url":"http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html"},{"type":"WEB","url":"https://seclists.org/bugtraq/2019/Aug/18"},{"type":"WEB","url":"https://usn.ubuntu.com/4116-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/4118-1/"},{"type":"WEB","url":"http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html"},{"type":"WEB","url":"https://seclists.org/bugtraq/2019/Aug/26"},{"type":"WEB","url":"https://support.f5.com/csp/article/K14673240?utm_source=f5support&amp%3Butm_medium=RSS"},{"type":"WEB","url":"https://usn.ubuntu.com/4094-1/"},{"type":"WEB","url":"http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3076"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3089"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0100"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0103"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0664"},{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20190905-0002/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3055"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3217"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0543"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0698"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4497"},{"type":"FIX","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54648cf1ec2d7f4b6a71767799c45676a138ca24"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/54648cf1ec2d7f4b6a71767799c45676a138ca24"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20856.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.18.7"}]}]}}],"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:H/A:H"}]}