CVE-2016-4440

HighCVSS 7.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-264

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66fVendor Advisory
http://www.openwall.com/lists/oss-security/2016/05/20/2Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1337806Issue Tracking
https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66fVendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66fVendor Advisory
http://www.openwall.com/lists/oss-security/2016/05/20/2Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1337806Issue Tracking
https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66fVendor Advisory

Timeline

Published: Jun 27, 2016
Last modified: Jun 17, 2026
NVD status: Modified

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