{"cve":{"cve_id":"CVE-2021-26406","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":0.00416,"epss_percentile":0.33165,"epss_as_of":"2026-06-23","description":"Insufficient validation in parsing Owner's\nCertificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization)\nand SEV-ES user application can lead to a host crash potentially resulting in\ndenial of service.\n\n\n\n\n","published_at":"2023-05-09T18:59:29.119000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":null,"nvd_references":["https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001","https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001"],"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":"2026-06-28T23:15:18.479889Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"1st-gen-amd-epyc-processors","product_name":"1st Gen AMD EPYC™ Processors","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:1st-gen-amd-epyc-processors:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"2nd-gen-amd-epyc-processors","product_name":"2nd Gen AMD EPYC™ Processors","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:2nd-gen-amd-epyc-processors:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"2nd-gen-amd-ryzen-threadripper-processors-colfax","product_name":"2nd Gen AMD Ryzen™ Threadripper™ Processors “Colfax”","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:2nd-gen-amd-ryzen-threadripper-processors-colfax:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"3rd-gen-amd-ryzen-threadripper-processors-castle-peak-hedt","product_name":"3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT","version_start":"various","version_start_inclusive":true,"version_end":"various","version_end_inclusive":true,"cpe23_uri":"cve5:amd:3rd-gen-amd-ryzen-threadripper-processors-castle-peak-hedt:various:various"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-5000-series-desktop-processors-vermeer-am4","product_name":"AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-5000-series-desktop-processors-vermeer-am4:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"athlon-3000-series-mobile-processors-with-radeon-graphics-dali-dali-ulp","product_name":"Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:athlon-3000-series-mobile-processors-with-radeon-graphics-dali-dali-ulp:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"athlon-3000-series-mobile-processors-with-radeon-graphics-pollock","product_name":"Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics   “Pollock”","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:athlon-3000-series-mobile-processors-with-radeon-graphics-pollock:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"ryzen-2000-series-desktop-processors-pinnacle-ridge","product_name":"Ryzen™ 2000 Series Desktop Processors “Pinnacle Ridge”","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:ryzen-2000-series-desktop-processors-pinnacle-ridge:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"ryzen-2000-series-desktop-processors-raven-ridge-am4","product_name":"Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:ryzen-2000-series-desktop-processors-raven-ridge-am4:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"ryzen-2000-series-mobile-processors-raven-ridge-fp5","product_name":"Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:ryzen-2000-series-mobile-processors-raven-ridge-fp5:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"ryzen-3000-series-desktop-processors-matisse-am4","product_name":"Ryzen™ 3000 Series Desktop Processors “Matisse” AM4","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:ryzen-3000-series-desktop-processors-matisse-am4:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"ryzen-3000-series-mobile-processor-2nd-gen-amd-ryzen-mobile-processors-with-radeon-graphics-picasso","product_name":"Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:ryzen-3000-series-mobile-processor-2nd-gen-amd-ryzen-mobile-processors-with-radeon-graphics-picasso:various :various "},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"ryzen-threadripper-pro-processors-castle-peak-ws","product_name":"Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS","version_start":"various ","version_start_inclusive":true,"version_end":"various ","version_end_inclusive":true,"cpe23_uri":"cve5:amd:ryzen-threadripper-pro-processors-castle-peak-ws:various :various "}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001","source_type":"MISC","tags":[]},{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2023-05-09T18:59:29.119000Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-06-24T00:31:38.771468Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:38.771468Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:38.771468Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:38.771468Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:38.771468Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:38.771468Z","label":"CVSS score revised","source":"vulnrichment"}]}