Vulnerability Description
KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to gain host OS privileges or cause a denial of service (out-of-bounds array access and host OS crash) via a crafted interrupt request, related to arch/x86/kvm/ioapic.c and arch/x86/kvm/ioapic.h.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.8, < 4.8.12 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb2PatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12Release Notes
- http://www.openwall.com/lists/oss-security/2016/12/02/2Mailing ListPatch
- http://www.securityfocus.com/bid/94640Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1400804Issue Tracking
- https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f575PatchVendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb2PatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12Release Notes
- http://www.openwall.com/lists/oss-security/2016/12/02/2Mailing ListPatch
- http://www.securityfocus.com/bid/94640Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1400804Issue Tracking
- https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f575PatchVendor Advisory
FAQ
What is CVE-2016-9777?
CVE-2016-9777 is a vulnerability with a CVSS score of 7.8 (HIGH). KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to gain host OS privileges or cause a denial of service (out-of-...
How severe is CVE-2016-9777?
CVE-2016-9777 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-2016-9777?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.