CVE-2011-4622

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.

4.9

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 0.05%

Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org

Affected: n/a n/a

References

Link	Tags
http://www.redhat.com/support/errata/RHSA-2012-0051.html	vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=769721
http://www.securityfocus.com/bid/51172	vdb entry
http://www.openwall.com/lists/oss-security/2011/12/21/7	mailing list
http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564	mailing list patch
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html	vendor advisory
http://www.securitytracker.com/id?1026559	vdb entry

Frequently Asked Questions

What is the severity of CVE-2011-4622?: CVE-2011-4622 has been scored as a medium severity vulnerability.
How to fix CVE-2011-4622?: To fix CVE-2011-4622, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-4622 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2011-4622 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.