CVE-2023-20540

{"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\u2122 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\u2122 5000 Series Desktop Processors", "versions": [{"status": "unaffected", "version": "ComboAM4v2PI 1.2.0.CA"}], "defaultStatus": "affected"}, {"vendor": "AMD", "product": "AMD Ryzen\u2122 Threadripper\u2122 3000 Series Processors", "versions": [{"status": "unaffected", "version": "CastlePeakPI-SP3r3 1.0.0.C"}], "defaultStatus": "affected"}, {"vendor": "AMD", "product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 3000WX Series Processors", "versions": [{"status": "unaffected", "version": "CastlePeakWSPI-sWRX8 1.0.0.E"}], "defaultStatus": "affected"}, {"vendor": "AMD", "product": "AMD Ryzen\u2122 Threadripper\u2122 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"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-20540", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-26T16:00:48.333509Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-26T16:00:53.648Z"}}], "cna": {"source": {"discovery": "UNKNOWN"}, "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 1.8, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "AMD", "product": "AMD Ryzen\u2122 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\u2122 5000 Series Desktop Processors", "versions": [{"status": "unaffected", "version": "ComboAM4v2PI 1.2.0.CA"}], "defaultStatus": "affected"}, {"vendor": "AMD", "product": "AMD Ryzen\u2122 Threadripper\u2122 3000 Series Processors", "versions": [{"status": "unaffected", "version": "CastlePeakPI-SP3r3 1.0.0.C"}], "defaultStatus": "affected"}, {"vendor": "AMD", "product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 3000WX Series Processors", "versions": [{"status": "unaffected", "version": "CastlePeakWSPI-sWRX8 1.0.0.E"}], "defaultStatus": "affected"}, {"vendor": "AMD", "product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 5000 WX-Series Processors", "versions": [{"status": "unaffected", "version": "ChagallWSPI-sWRX8 1.0.0.9"}], "defaultStatus": "affected"}], "references": [{"url": "https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4012.html"}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "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", "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.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-208", "description": "CWE-208 Observable timing discrepancy"}]}], "providerMetadata": {"orgId": "b58fc414-a1e4-4f92-9d70-1add41838648", "shortName": "AMD", "dateUpdated": "2026-06-26T15:44:59.841Z"}}}, "cveMetadata": {"cveId": "CVE-2023-20540", "state": "PUBLISHED", "dateUpdated": "2026-06-26T16:00:59.349Z", "dateReserved": "2022-10-27T18:53:39.742Z", "assignerOrgId": "b58fc414-a1e4-4f92-9d70-1add41838648", "datePublished": "2026-06-26T15:44:59.841Z", "assignerShortName": "AMD"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "affected", "product": "AMD Ryzen\u2122 3000 Series Desktop Processors", "vendor": "AMD", "versions": [{"status": "unaffected", "version": "ComboAM4 1.0.0.E"}, {"status": "unaffected", "version": "ComboAM4v2PI 1.2.0.CA"}]}, {"defaultStatus": "affected", "product": "AMD Ryzen\u2122 5000 Series Desktop Processors", "vendor": "AMD", "versions": [{"status": "unaffected", "version": "ComboAM4v2PI 1.2.0.CA"}]}, {"defaultStatus": "affected", "product": "AMD Ryzen\u2122 Threadripper\u2122 3000 Series Processors", "vendor": "AMD", "versions": [{"status": "unaffected", "version": "CastlePeakPI-SP3r3 1.0.0.C"}]}, {"defaultStatus": "affected", "product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 3000WX Series Processors", "vendor": "AMD", "versions": [{"status": "unaffected", "version": "CastlePeakWSPI-sWRX8 1.0.0.E"}]}, {"defaultStatus": "affected", "product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 5000 WX-Series Processors", "vendor": "AMD", "versions": [{"status": "unaffected", "version": "ChagallWSPI-sWRX8 1.0.0.9"}]}], "source": "psirt@amd.com"}], "cveTags": [], "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."}], "id": "CVE-2023-20540", "lastModified": "2026-06-26T20:04:17.603", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 1.8, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "psirt@amd.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-20540", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-26T16:00:48.333509Z", "version": "2.0.3"}}]}, "published": "2026-06-26T16:16:28.810", "references": [{"source": "psirt@amd.com", "url": "https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4012.html"}], "sourceIdentifier": "psirt@amd.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-208"}], "source": "psirt@amd.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "ComboAM4 1.0.0.E"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "ComboAM4v2PI 1.2.0.CA"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "AMD Ryzen\u2122 3000 Series Desktop Processors", "source": "cna", "vendor": "AMD"}, "product": "ryzen_3000_series_desktop_processors", "vendor": "amd"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "ComboAM4v2PI 1.2.0.CA"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "AMD Ryzen\u2122 5000 Series Desktop Processors", "source": "cna", "vendor": "AMD"}, "product": "ryzen_5000_series_desktop_processors", "vendor": "amd"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "CastlePeakPI-SP3r3 1.0.0.C"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "AMD Ryzen\u2122 Threadripper\u2122 3000 Series Processors", "source": "cna", "vendor": "AMD"}, "product": "ryzen_threadripper_3000_series_processors", "vendor": "amd"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "CastlePeakWSPI-sWRX8 1.0.0.E"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 3000WX Series Processors", "source": "cna", "vendor": "AMD"}, "product": "ryzen_threadripper_pro_3000_wx-series_processors", "vendor": "amd"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "ChagallWSPI-sWRX8 1.0.0.9"}}], "enrichment": {"confidence": 95.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "matching"}]}, "original": {"product": "AMD Ryzen\u2122 Threadripper\u2122 PRO 5000 WX-Series Processors", "source": "cna", "vendor": "AMD"}, "product": "ryzen_threadripper_pro_5000_wx-series_processors", "vendor": "amd"}], "created": "2026-06-26T17:45:03.935919+00:00", "updated": "2026-06-29T20:06:31.878591+00:00", "vendors": ["amd", "amd$PRODUCT$ryzen_3000_series_desktop_processors", "amd$PRODUCT$ryzen_5000_series_desktop_processors", "amd$PRODUCT$ryzen_threadripper_3000_series_processors", "amd$PRODUCT$ryzen_threadripper_pro_3000_wx-series_processors", "amd$PRODUCT$ryzen_threadripper_pro_5000_wx-series_processors"]}