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…
Does this matter?
Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 2.0
- 4.9 MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
- EPSS
- 0.35% probability · 28th percentile
- CISA KEV
- Not listed
- Affected
- redhat/kvm
- Source
- secalert@redhat.com
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/83564Patch
- 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/83564Patch
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.