CVE-2011-4622

CVE Details

Release Date:	2012-01-27
Impact:	Moderate	What is this?

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.

See more information about CVE-2011-4622 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	4.9
Vector String:	AV:L/AC:L/Au:N/C:N/I:N/A:C
Version:	2.0
Attack Vector:	Local
Attack Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete

Errata information

Platform	Errata	Release Date
Oracle Linux version 5 (kernel-uek)	ELSA-2012-2003	2012-03-07
Oracle Linux version 5 (kvm)	ELSA-2012-0051	2012-01-23
Oracle Linux version 5 (mlnx_en-2.6.32-300.11.1.el5uek)	ELSA-2012-2003	2012-03-07
Oracle Linux version 5 (ofa-2.6.32-300.11.1.el5uek)	ELSA-2012-2003	2012-03-07
Oracle Linux version 6 (kernel)	ELSA-2012-0350	2012-03-06
Oracle Linux version 6 (kernel-uek)	ELSA-2012-2003	2012-03-07
Oracle Linux version 6 (mlnx_en-2.6.32-300.11.1.el6uek)	ELSA-2012-2003	2012-03-07
Oracle Linux version 6 (ofa-2.6.32-300.11.1.el6uek)	ELSA-2012-2003	2012-03-07