CVE-2011-4622 Null dereference in n/a
Local users can cause a denial of service via NULL pointer dereference in KVM PIT timer handling when irqchip is unavailable.
- 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-2011-4622?
CVE-2011-4622 is a medium-severity vulnerability in n/a, published on 27 Jan 2012. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The create_pit_timer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer (PIT) interrupt requests (IRQs) when a virtual interrupt controller (irqchip) is not available, which allows local users to cause a denial of service (NULL pointer dereference) by starting a timer.
Which versions are affected by CVE-2011-4622?
It affects 1 product.
Products include Redhat Kvm.
How do I fix CVE-2011-4622?
Apply the vendor's patch.
Is CVE-2011-4622 being exploited?
There is no known exploitation of CVE-2011-4622 in the wild and no public exploit code.
Sources
Also known as GHSA-gqh3-j9ff-5g88.