CVE-2016-9777 Memory corruption in n/a
Guest OS users can gain host privileges or crash the host via crafted interrupts when I/O APIC is enabled due to improper VCPU index restriction.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-9777?
CVE-2016-9777 is a high-severity memory corruption vulnerability in Linux kernel, published on 28 Dec 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2016-9777?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2016-9777?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2016-9777 being exploited?
There is no known exploitation of CVE-2016-9777 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2016-9777, GHSA-2x32-fffh-53mr, UBUNTU-CVE-2016-9777.