Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.5, < 4.7 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424Vendor 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/3ce424e45411cf5a13105e0386b6ecf6eeb4f66Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424Vendor 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/3ce424e45411cf5a13105e0386b6ecf6eeb4f66Vendor Advisory
FAQ
What is CVE-2016-4440?
CVE-2016-4440 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 ...
How severe is CVE-2016-4440?
CVE-2016-4440 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-4440?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.