{"cve":{"cve_id":"CVE-2023-20578","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":0.00116,"epss_percentile":0.01909,"epss_as_of":"2026-06-23","description":"A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow\nan attacker with ring0 privileges and access to the\nBIOS menu or UEFI shell to modify the communications buffer potentially\nresulting in arbitrary code execution.","published_at":"2024-08-13T16:52:58.457000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/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":"none","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-367"],"nvd_references":["https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.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":"2026-06-29T01:24:59.365230Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","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":"H","value_label":"High"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"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":"amd","vendor_name":"AMD","product_slug":"amd-epyc-7001-processors","product_name":"AMD EPYC™ 7001 Processors","version_start":"NaplesPI 1.0.0.K","version_start_inclusive":true,"version_end":"NaplesPI 1.0.0.K","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-7001-processors:NaplesPI 1.0.0.K:NaplesPI 1.0.0.K"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-7002-processors","product_name":"AMD EPYC™ 7002 Processors","version_start":"RomePI 1.0.0.G","version_start_inclusive":true,"version_end":"RomePI 1.0.0.G","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-7002-processors:RomePI 1.0.0.G:RomePI 1.0.0.G"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-7003-processors","product_name":"AMD EPYC™ 7003 Processors","version_start":"MilanPI 1.0.0.B","version_start_inclusive":true,"version_end":"MilanPI 1.0.0.B","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-7003-processors:MilanPI 1.0.0.B:MilanPI 1.0.0.B"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-9004-processors","product_name":"AMD EPYC™ 9004 Processors","version_start":"GenoaPI 1.0.0.2","version_start_inclusive":true,"version_end":"GenoaPI 1.0.0.2","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-9004-processors:GenoaPI 1.0.0.2:GenoaPI 1.0.0.2"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-embedded-3000","product_name":"AMD EPYC™ Embedded 3000","version_start":"SnowyOwl  PI 1.1.0.A","version_start_inclusive":true,"version_end":"SnowyOwl  PI 1.1.0.A","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-embedded-3000:SnowyOwl  PI 1.1.0.A:SnowyOwl  PI 1.1.0.A"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-embedded-7002","product_name":"AMD EPYC™ Embedded 7002","version_start":"EmbRomePI-SP3 1.0.0.A","version_start_inclusive":true,"version_end":"EmbRomePI-SP3 1.0.0.A","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-embedded-7002:EmbRomePI-SP3 1.0.0.A:EmbRomePI-SP3 1.0.0.A"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-embedded-7003","product_name":"AMD EPYC™ Embedded 7003","version_start":"EmbMilanPI-SP3 1.0.0.7","version_start_inclusive":true,"version_end":"EmbMilanPI-SP3 1.0.0.7","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-embedded-7003:EmbMilanPI-SP3 1.0.0.7:EmbMilanPI-SP3 1.0.0.7"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-epyc-embedded-9003","product_name":"AMD EPYC™ Embedded 9003","version_start":"EmbGenoaPI-SP5  1.0.0.0","version_start_inclusive":true,"version_end":"EmbGenoaPI-SP5  1.0.0.0","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-epyc-embedded-9003:EmbGenoaPI-SP5  1.0.0.0:EmbGenoaPI-SP5  1.0.0.0"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-6000-series-processors-with-radeon-graphics","product_name":"AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics","version_start":"RembrandtPI-FP7 1.0.0.9b","version_start_inclusive":true,"version_end":"RembrandtPI-FP7 1.0.0.9b","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-6000-series-processors-with-radeon-graphics:RembrandtPI-FP7 1.0.0.9b:RembrandtPI-FP7 1.0.0.9b"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-7000-series-desktop-processors","product_name":"AMD Ryzen™ 7000 Series Desktop Processors","version_start":"ComboAM5 1.0.0.1","version_start_inclusive":true,"version_end":"ComboAM5 1.0.0.1","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-7000-series-desktop-processors:ComboAM5 1.0.0.1:ComboAM5 1.0.0.1"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-7020-series-processors-with-radeon-graphics","product_name":"AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics","version_start":"MendocinoPI-FT6 1.0.0.0","version_start_inclusive":true,"version_end":"MendocinoPI-FT6 1.0.0.0","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-7020-series-processors-with-radeon-graphics:MendocinoPI-FT6 1.0.0.0:MendocinoPI-FT6 1.0.0.0"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-7035-series-processors-with-radeon-graphics","product_name":"AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics","version_start":"RembrandtPI-FP7 1.0.0.9b","version_start_inclusive":true,"version_end":"RembrandtPI-FP7 1.0.0.9b","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-7035-series-processors-with-radeon-graphics:RembrandtPI-FP7 1.0.0.9b:RembrandtPI-FP7 1.0.0.9b"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-embedded-7000","product_name":"AMD Ryzen™ Embedded 7000","version_start":"EmbeddedAM5PI  1.0.0.0","version_start_inclusive":true,"version_end":"EmbeddedAM5PI  1.0.0.0","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-embedded-7000:EmbeddedAM5PI  1.0.0.0:EmbeddedAM5PI  1.0.0.0"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzen-threadripper-pro-5000wx-processors","product_name":"AMD Ryzen™ Threadripper™ PRO 5000WX Processors","version_start":"ChagallWSPI-sWRX8  1.0.0.7","version_start_inclusive":true,"version_end":"ChagallWSPI-sWRX8  1.0.0.7","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzen-threadripper-pro-5000wx-processors:ChagallWSPI-sWRX8  1.0.0.7:ChagallWSPI-sWRX8  1.0.0.7"},{"vendor_slug":"amd","vendor_name":"AMD","product_slug":"amd-ryzentm-embedded-v3000","product_name":"AMD RyzenTM Embedded V3000","version_start":"EmbeddedPI-FP7r2 1.0.0.8","version_start_inclusive":true,"version_end":"EmbeddedPI-FP7r2 1.0.0.8","version_end_inclusive":true,"cpe23_uri":"cve5:amd:amd-ryzentm-embedded-v3000:EmbeddedPI-FP7r2 1.0.0.8:EmbeddedPI-FP7r2 1.0.0.8"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2024-08-13T16:52:58.457000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:25:52.357625Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:25:52.357625Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:25:52.357625Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:24:59.365230Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:24:59.365230Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:24:59.365230Z","label":"SSVC decision revised","source":"vulnrichment"}]}