{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-20540","assignerOrgId":"b58fc414-a1e4-4f92-9d70-1add41838648","state":"PUBLISHED","assignerShortName":"AMD","dateReserved":"2022-10-27T18:53:39.742Z","datePublished":"2026-06-26T15:44:59.841Z","dateUpdated":"2026-06-26T16:00:59.349Z"},"containers":{"cna":{"providerMetadata":{"orgId":"b58fc414-a1e4-4f92-9d70-1add41838648","shortName":"AMD","dateUpdated":"2026-06-26T15:44:59.841Z"},"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-208","description":"CWE-208 Observable timing discrepancy","type":"CWE"}]}],"affected":[{"vendor":"AMD","product":"AMD Ryzen™ 3000 Series Desktop Processors","versions":[{"status":"unaffected","version":"ComboAM4  1.0.0.E"},{"status":"unaffected","version":"ComboAM4v2PI  1.2.0.CA"}],"defaultStatus":"affected"},{"vendor":"AMD","product":"AMD Ryzen™ 5000 Series Desktop Processors","versions":[{"status":"unaffected","version":"ComboAM4v2PI  1.2.0.CA"}],"defaultStatus":"affected"},{"vendor":"AMD","product":"AMD Ryzen™ Threadripper™ 3000 Series Processors","versions":[{"status":"unaffected","version":"CastlePeakPI-SP3r3  1.0.0.C"}],"defaultStatus":"affected"},{"vendor":"AMD","product":"AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors","versions":[{"status":"unaffected","version":"CastlePeakWSPI-sWRX8  1.0.0.E"}],"defaultStatus":"affected"},{"vendor":"AMD","product":"AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors","versions":[{"status":"unaffected","version":"ChagallWSPI-sWRX8  1.0.0.9"}],"defaultStatus":"affected"}],"descriptions":[{"lang":"en","value":"An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authentication code, allowing arbitrary message input, potentially leading to a loss of data integrity.","supportingMedia":[{"type":"text/html","base64":false,"value":"An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authentication code, allowing arbitrary message input, potentially leading to a loss of data integrity."}]}],"references":[{"url":"https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4012.html"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"LOW","baseScore":1.8,"vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-26T16:00:48.333509Z","id":"CVE-2023-20540","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-26T16:00:59.349Z"}}]}}