{"cve":"CVE-2021-26406","nvd":{"published":"2023-05-09T19:15:10.943","modified":"2026-06-17T03:43:20.600","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"references":["https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001","https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001","https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001","https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001"],"products":["amd:epyc_7232p_firmware","amd:epyc_7251_firmware","amd:epyc_7252_firmware","amd:epyc_7261_firmware","amd:epyc_7262_firmware","amd:epyc_7272_firmware","amd:epyc_7281_firmware","amd:epyc_7282_firmware","amd:epyc_7301_firmware","amd:epyc_7302_firmware","amd:epyc_7302p_firmware","amd:epyc_7351_firmware","amd:epyc_7351p_firmware","amd:epyc_7352_firmware","amd:epyc_7371_firmware","amd:epyc_7401_firmware","amd:epyc_7401p_firmware","amd:epyc_7402_firmware","amd:epyc_7402p_firmware","amd:epyc_7451_firmware","amd:epyc_7452_firmware","amd:epyc_7501_firmware","amd:epyc_7502_firmware","amd:epyc_7502p_firmware","amd:epyc_7532_firmware","amd:epyc_7542_firmware","amd:epyc_7551_firmware","amd:epyc_7551p_firmware","amd:epyc_7552_firmware","amd:epyc_7571_firmware","amd:epyc_7601_firmware","amd:epyc_7642_firmware","amd:epyc_7662_firmware","amd:epyc_7702_firmware","amd:epyc_7702p_firmware","amd:epyc_7742_firmware","amd:epyc_7f32_firmware","amd:epyc_7f52_firmware","amd:epyc_7f72_firmware","amd:epyc_7h12_firmware"],"source":"nvd","synced_at":"2026-10-19T21:38:18.424950729+00:00"},"epss":{"cve":"CVE-2021-26406","score":0.00416,"percentile":0.3593,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}