CVE-2011-4622
MEDIUM · CVSS 4.9EPSS 0.3%EU EUVD
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.
Key facts
- CVSS score
- 4.9 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:L/AC:L/Au:N/C:N/I:N/A:C- EPSS score
- 0.3% (28th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-4545)
- Published
- January 27, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-4545 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- redhat / kvm
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(Patch)
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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