{"id":"CVE-2016-4440","details":"arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which allows guest OS users to obtain direct APIC MSR access on the host OS, and consequently cause a denial of service (host OS crash) or possibly execute arbitrary code on the host OS, via x2APIC mode.","modified":"2026-03-15T22:07:47.315757Z","published":"2016-06-27T10:59:07.783Z","references":[{"type":"ADVISORY","url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66f"},{"type":"ADVISORY","url":"https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66f"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1337806"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2016/05/20/2"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"4.5"},{"fixed":"4.7"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4440.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}