CVE-2010-0309 Denial of service in n/a

Medium 6.8 Published 12 Feb 2010 Updated 7 Aug 2024

Guest OS users can crash or hang the host OS by reading /dev/port due to improper PIT emulation handling in KVM.

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-2010-0309?

CVE-2010-0309 is a medium-severity denial of service vulnerability in n/a, published on 12 Feb 2010. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.

Weakness: CWE-16

Which versions are affected by CVE-2010-0309?

It affects 1 product.

Products include Linux Kernel.

How do I fix CVE-2010-0309?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2010-0309 being exploited?

There is no known exploitation of CVE-2010-0309 in the wild and no public exploit code.

Sources

Also known as AZL-34841, AZL-6509, GHSA-wqgc-3hgm-hrw9.