{"id":"CVE-2019-3887","details":"A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.","modified":"2026-03-15T21:56:41.352697Z","published":"2019-04-09T16:29:01.990Z","related":["CGA-wjfq-rjw8-x7xh","openSUSE-SU-2024:10728-1","openSUSE-SU-2024:13704-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3979-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3980-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3980-2/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/107850"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2703"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2741"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-3887.json","unresolved_ranges":[{"events":[{"introduced":"4.16"}]},{"events":[{"introduced":"0"},{"last_affected":"29"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]},{"events":[{"introduced":"0"},{"last_affected":"19.04"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.1"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]},{"events":[{"introduced":"0"},{"last_affected":"8"}]},{"events":[{"introduced":"0"},{"last_affected":"8"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H"}]}