{"id":"CVE-2016-4440","aliases":["DEBIAN-CVE-2016-4440","EUVD-2016-5430","GHSA-862v-p357-9hfp","UBUNTU-CVE-2016-4440"],"status":"published","title":"arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which...","description":"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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00365,"percentile":0.30581,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-264"],"published":"2016-06-27T10:00:00Z","modified":"2026-09-22T07:00:47Z","fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["4.5.5-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["4.5.5-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["4.5.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.5-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.5-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.5-1"}]}]}],"products":[{"vendor":"linux","product":"linux_kernel"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1337806","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","report"]},{"url":"http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66f","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2016/05/20/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","article","report"]},{"url":"https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66f","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4440"},{"url":"https://github.com/advisories/GHSA-862v-p357-9hfp"},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-4440","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-4440","tags":["report"]},{"url":"http://comments.gmane.org/gmane.comp.emulators.kvm.devel/152100","tags":["report"]},{"url":"http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/152191","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-4440","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2016-4440","description":"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.","status":"published","published":"2016-06-27T10:00:00Z","modified":"2024-08-06T00:32:24.63Z","updated_at":"2026-11-02T14:33:34.815789Z"}],"euvd":[{"id":"EUVD-2016-5430","description":"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.","status":"published","published":"2016-06-27T10:00:00Z","modified":"2024-08-06T00:32:24Z","updated_at":"2026-11-03T02:22:46.329763Z"}],"ghsa":[{"id":"GHSA-862v-p357-9hfp","title":"arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which...","description":"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.","status":"published","published":"2022-05-17T03:52:23Z","modified":"2023-02-02T05:03:40Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:51:41.689943Z"}],"nvd":[{"id":"CVE-2016-4440","description":"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.","status":"published","published":"2016-06-27T10:59:07.783Z","modified":"2026-06-17T00:47:33.753Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:03:26.642445Z"}],"osv":[{"id":"CVE-2016-4440","description":"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.","status":"published","published":"2016-06-27T10:59:07.783Z","modified":"2026-03-15T22:07:47.315757Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:02.454775Z"},{"id":"DEBIAN-CVE-2016-4440","description":"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.","status":"published","published":"2016-06-27T10:59:07.783Z","modified":"2026-09-22T07:00:47.330468887Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:27.627285Z"},{"id":"UBUNTU-CVE-2016-4440","description":"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.","status":"withdrawn","published":"2016-06-27T10:59:00Z","modified":"2025-07-16T07:34:32.644199Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:12.261906Z"}]}}