Vulnerability Details CVE-2016-4440
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 32.5%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66f
- http://www.openwall.com/lists/oss-security/2016/05/20/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1337806
- https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66f
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66f
- http://www.openwall.com/lists/oss-security/2016/05/20/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1337806
- https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66f
Products affected by CVE-2016-4440
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cpe:2.3:o:linux:linux_kernel:4.5
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cpe:2.3:o:linux:linux_kernel:4.5.0
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cpe:2.3:o:linux:linux_kernel:4.5.1
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cpe:2.3:o:linux:linux_kernel:4.5.2
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cpe:2.3:o:linux:linux_kernel:4.5.3
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cpe:2.3:o:linux:linux_kernel:4.5.4
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cpe:2.3:o:linux:linux_kernel:4.5.5
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cpe:2.3:o:linux:linux_kernel:4.5.6
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cpe:2.3:o:linux:linux_kernel:4.5.7
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cpe:2.3:o:linux:linux_kernel:4.6
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cpe:2.3:o:linux:linux_kernel:4.6.1
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cpe:2.3:o:linux:linux_kernel:4.6.2
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cpe:2.3:o:linux:linux_kernel:4.6.3
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cpe:2.3:o:linux:linux_kernel:4.6.4
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cpe:2.3:o:linux:linux_kernel:4.6.5
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cpe:2.3:o:linux:linux_kernel:4.6.6
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cpe:2.3:o:linux:linux_kernel:4.6.7