{"cve":{"cve_id":"CVE-2011-4622","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00363,"epss_percentile":0.28033,"epss_as_of":"2026-06-23","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.","published_at":"2012-01-27T15:00:00Z","last_modified_at":"2026-06-16T23:35:09.813000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_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"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:06:03.568905Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"kvm","product_name":"kvm","version_start":"83","version_start_inclusive":true,"version_end":"83","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:redhat:kvm:83:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://www.redhat.com/support/errata/RHSA-2012-0051.html","source_type":"MISC","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=769721","source_type":"MISC","tags":[]},{"url":"http://www.securityfocus.com/bid/51172","source_type":"MISC","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2011/12/21/7","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564","source_type":"MISC","tags":[]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://www.securitytracker.com/id?1026559","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2012-01-27T15:00:00Z","label":"CVE published","source":null}]}