CVE-2011-4622
CVE-2011-4622 is a medium-severity vulnerability in Redhat Kvm with a CVSS 2.0 base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 2.0 base score 4.9)
- EPSS exploit prediction: 0% (28th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Redhat Kvm
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2011-4622?
- CVE-2011-4622 has a CVSS 2.0 base score of 4.9, rated medium severity.
- Is CVE-2011-4622 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-4622?
- CVE-2011-4622 affects Redhat Kvm. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2011-4622?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2011-4622 published?
- CVE-2011-4622 was published on 2012-01-27 and last updated on 2026-06-16.
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
Affected products (1)
- cpe:2.3:a:redhat:kvm:83:*:*:*:*:*:*:*
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