{"cve":{"cve_id":"CVE-2019-14821","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":0.00763,"epss_percentile":0.50565,"epss_as_of":"2026-06-23","description":"An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.","published_at":"2019-09-19T17:37:24Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H","cvss_v3_severity":"HIGH","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":["CWE-787"],"nvd_references":["https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821","http://www.openwall.com/lists/oss-security/2019/09/20/1","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/","https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html","https://seclists.org/bugtraq/2019/Sep/41","https://www.debian.org/security/2019/dsa-4531","https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/","https://security.netapp.com/advisory/ntap-20191004-0001/","http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html","http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html","https://usn.ubuntu.com/4157-1/","https://usn.ubuntu.com/4162-1/","https://usn.ubuntu.com/4157-2/","https://usn.ubuntu.com/4163-1/","https://usn.ubuntu.com/4163-2/","https://usn.ubuntu.com/4162-2/","http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html","https://access.redhat.com/errata/RHSA-2019:3309","https://access.redhat.com/errata/RHSA-2019:3517","https://seclists.org/bugtraq/2019/Nov/11","http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html","https://access.redhat.com/errata/RHSA-2019:3978","https://access.redhat.com/errata/RHSA-2019:3979","https://access.redhat.com/errata/RHSA-2019:4154","https://access.redhat.com/errata/RHSA-2019:4256","https://access.redhat.com/errata/RHSA-2020:0027","https://access.redhat.com/errata/RHSA-2020:0204","https://www.oracle.com/security-alerts/cpuapr2020.html"],"vuln_status":null,"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":"2026-06-28T23:12:11.950495Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"kernel","product_name":"Kernel","version_start":"all through 5.3","version_start_inclusive":true,"version_end":"all through 5.3","version_end_inclusive":true,"cpe23_uri":"cve5:linux:kernel:all through 5.3:all through 5.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821","source_type":"MISC","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2019/09/20/1","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://seclists.org/bugtraq/2019/Sep/41","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://www.debian.org/security/2019/dsa-4531","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://security.netapp.com/advisory/ntap-20191004-0001/","source_type":"MISC","tags":[]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://usn.ubuntu.com/4157-1/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://usn.ubuntu.com/4162-1/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://usn.ubuntu.com/4157-2/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://usn.ubuntu.com/4163-1/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://usn.ubuntu.com/4163-2/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://usn.ubuntu.com/4162-2/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html","source_type":"EXPLOIT","tags":["exploit","patch"]},{"url":"https://access.redhat.com/errata/RHSA-2019:3309","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2019:3517","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://seclists.org/bugtraq/2019/Nov/11","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html","source_type":"EXPLOIT","tags":["exploit"]},{"url":"https://access.redhat.com/errata/RHSA-2019:3978","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2019:3979","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2019:4154","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2019:4256","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2020:0027","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2020:0204","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.oracle.com/security-alerts/cpuapr2020.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2019-09-19T17:37:24Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T16:59:49.989342Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T16:59:49.989342Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T16:59:49.989342Z","label":"CVSS score revised","source":"cvelistv5"}]}