CVE-2011-4622

MEDIUM

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.

References

http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html

http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html

http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564

http://www.openwall.com/lists/oss-security/2011/12/21/7

http://www.redhat.com/support/errata/RHSA-2012-0051.html

http://www.securityfocus.com/bid/51172

http://www.securitytracker.com/id?1026559

https://bugzilla.redhat.com/show_bug.cgi?id=769721

Details

Source: MITRE

Published: 2012-01-27

Updated: 2017-12-29

Risk Information

CVSS v2.0

Base Score: 4.9

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

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM