Mission and Overview
NVD is the U.S. government repository of standards based vulnerability management data. This data enables automation of vulnerability management, security measurement, and compliance (e.g. FISMA).
Resource Status
NVD contains:

Last updated: 10/21/2014 2:18:04 PM

CVE Publication rate: 54.77

Email List

NVD provides four mailing lists to the public. For information and subscription instructions please visit NVD Mailing Lists

Workload Index
Vulnerability Workload Index: 15.07
About Us
NVD is a product of the NIST Computer Security Division and is sponsored by the Department of Homeland Security's National Cyber Security Division. It supports the U.S. government multi-agency (OSD, DHS, NSA, DISA, and NIST) Information Security Automation Program. It is the U.S. government content repository for the Security Content Automation Protocol (SCAP).

National Cyber Awareness System

Vulnerability Summary for CVE-2011-4622

Original release date: 01/27/2012
Last revised: 06/20/2013
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.9 (MEDIUM) (AV:L/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore: 6.9
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

External Source: BID
Name: 51172
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=769721
External Source: MLIST
Name: [kvm] 20111214 [PATCH 1/2] KVM: x86: Prevent starting PIT timers in the absence of irqchip support
Type: Patch Information
External Source: REDHAT
Name: RHSA-2012:0051
External Source: SECTRACK
Name: 1026559
External Source: SUSE
Name: openSUSE-SU-2013:0925
External Source: MLIST
Name: [oss-security] 20111221 Re: kernel: kvm: pit timer with no irqchip crashes the system

Vulnerable software and versions

Skip Navigation Links.
* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)