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CVE Database

CVE-2011-4622

Impact: Moderate
Public: 2011-12-14
Bugzilla: 769721: CVE-2011-4622 kernel: kvm: pit timer with no irqchip crashes the system
IAVA: 2011-B-0021

Details

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2011-4622 from the MITRE CVE dictionary and NIST NVD.

Statement

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 and Red Hat Enterprise MRG as they did not provide support for the KVM subsystem. It has been addressed in Red Hat Enterprise 5 and 6 via https://rhn.redhat.com/errata/RHSA-2012-0051.html and https://rhn.redhat.com/errata/RHSA-2012-0350.html.

CVSS v2 metrics

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

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
RHEL Virtualization version 5 (kvm) RHSA-2012:0051 January 23, 2012
Red Hat Enterprise Linux version 6 (kernel) RHSA-2012:0350 March 06, 2012

External References

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.