CVE-2016-9777

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory kernel.org Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12 release notes
https://bugzilla.redhat.com/show_bug.cgi?id=1400804 issue tracking
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755 patch vendor advisory
http://www.securityfocus.com/bid/94640 third party advisory vdb entry
https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755 patch vendor advisory
http://www.openwall.com/lists/oss-security/2016/12/02/2 patch mailing list

Frequently Asked Questions

What is the severity of CVE-2016-9777?
CVE-2016-9777 has been scored as a high severity vulnerability.
How to fix CVE-2016-9777?
To fix CVE-2016-9777, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9777 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9777 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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