Vulnerability Details CVE-2011-4622
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 15.5%
CVSS Severity
CVSS v2 Score 4.9
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
- 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