{"id":"CVE-2020-27672","details":"An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.","modified":"2026-03-15T22:35:28.892915Z","published":"2020-10-22T21:15:13.950Z","related":["SUSE-SU-2020:14557-1","SUSE-SU-2020:3049-1","SUSE-SU-2020:3050-1","SUSE-SU-2020:3051-1","SUSE-SU-2020:3052-1","SUSE-SU-2020:3088-1","SUSE-SU-2020:3611-1","SUSE-SU-2020:3615-1","SUSE-SU-2020:3627-1","SUSE-SU-2020:3631-1","SUSE-SU-2020:3653-1","SUSE-SU-2020:3742-1","openSUSE-SU-2020:1783-1","openSUSE-SU-2020:1844-1","openSUSE-SU-2020:2162-1","openSUSE-SU-2020:2192-1","openSUSE-SU-2024:11520-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/01/19/7"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202011-06"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4804"},{"type":"FIX","url":"http://xenbits.xen.org/xsa/advisory-345.html"},{"type":"FIX","url":"https://xenbits.xen.org/xsa/advisory-345.html"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"3.2.0"},{"last_affected":"4.14.0"}]},{"events":[{"introduced":"0"},{"last_affected":"31"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27672.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}