{"id":"CVE-2011-4622","state":"PUBLISHED","title":"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 (IR","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.","publishedAt":"2012-01-27T15:00:00.000Z","updatedAt":"2024-08-07T00:09:19.494Z","severity":null,"assigner":"redhat","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["http://www.redhat.com/support/errata/RHSA-2012-0051.html","https://bugzilla.redhat.com/show_bug.cgi?id=769721","http://www.securityfocus.com/bid/51172","http://www.openwall.com/lists/oss-security/2011/12/21/7","http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564","http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html","http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html","http://www.securitytracker.com/id?1026559"],"weaknesses":[],"ingestedAt":"2026-10-29T19:40:05.264Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2011/4xxx/CVE-2011-4622.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2011-4622","state":"PUBLISHED","datePublished":"2012-01-27T15:00:00.000Z","dateUpdated":"2024-08-07T00:09:19.494Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2011-11-29T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"http://www.redhat.com/support/errata/RHSA-2012-0051.html","name":"RHSA-2012:0051","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=769721","tags":["x_refsource_CONFIRM"]},{"url":"http://www.securityfocus.com/bid/51172","name":"51172","tags":["vdb-entry","x_refsource_BID"]},{"url":"http://www.openwall.com/lists/oss-security/2011/12/21/7","name":"[oss-security] 20111221 Re: kernel: kvm: pit timer with no irqchip crashes the 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Container","references":[{"url":"http://www.redhat.com/support/errata/RHSA-2012-0051.html","name":"RHSA-2012:0051","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=769721","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.securityfocus.com/bid/51172","name":"51172","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2011/12/21/7","name":"[oss-security] 20111221 Re: kernel: kvm: pit timer with no irqchip crashes the system","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564","name":"[kvm] 20111214 [PATCH 1/2] KVM: x86: Prevent starting PIT timers in the absence of irqchip 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