CVE-2011-4622

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2011-4622
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2012-01-27 15:55:04 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 4.9 from [email protected]

AV:L/AC:L/Au:N/C:N/I:N/A:C

Problem Types: NVD-CWE-noinfo | n/a

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:L/AC:L/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Redhat Kvm 83 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[security-announce] SUSE-SU-2012:0616-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Linux Kernel KVM 'create_pit_timer()' Function Local Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Support af854a3a-2127-422b-91ae-364da2661108 www.redhat.com
Bug 769721 – CVE-2011-4622 kernel: kvm: pit timer with no irqchip crashes the system af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
oss-security - Re: kernel: kvm: pit timer with no irqchip crashes the system af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
KVM PIT IRQ Bug Lets Local Users Deny Service - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
[security-announce] openSUSE-SU-2013:0925-1: important: kernel: security af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
[PATCH 1/2] KVM: x86: Prevent starting PIT timers in the absence of ir af854a3a-2127-422b-91ae-364da2661108 permalink.gmane.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report