{"id":"CVE-2021-26406","aliases":["EUVD-2021-13212","GHSA-r2pm-cwg9-cpwh"],"status":"published","title":"Insufficient validation in parsing Owner's\nCertificate Authority (OCA) certificates in SEV (AMD...","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00416,"percentile":0.364,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2023-05-09T18:59:29Z","modified":"2026-06-17T03:43:20Z","products":[{"vendor":"amd","product":"1st gen amd epyc™ processors"},{"vendor":"amd","product":"2nd gen amd epyc™ processors"},{"vendor":"amd","product":"2nd gen amd ryzen™ threadripper™ processors “colfax”"},{"vendor":"amd","product":"3rd gen amd ryzen™ threadripper™ processors “castle peak” hedt"},{"vendor":"amd","product":"amd ryzen™ 5000 series desktop processors “vermeer” am4"},{"vendor":"amd","product":"athlon™ 3000 series mobile processors with radeon™ graphics   “pollock”"},{"vendor":"amd","product":"athlon™ 3000 series mobile processors with radeon™ graphics “dali”/”dali” ulp"},{"vendor":"amd","product":"epyc_7232p_firmware"},{"vendor":"amd","product":"epyc_7251_firmware"},{"vendor":"amd","product":"epyc_7252_firmware"},{"vendor":"amd","product":"epyc_7261_firmware"},{"vendor":"amd","product":"epyc_7262_firmware"},{"vendor":"amd","product":"epyc_7272_firmware"},{"vendor":"amd","product":"epyc_7281_firmware"},{"vendor":"amd","product":"epyc_7282_firmware"},{"vendor":"amd","product":"epyc_7301_firmware"},{"vendor":"amd","product":"epyc_7302_firmware"},{"vendor":"amd","product":"epyc_7302p_firmware"},{"vendor":"amd","product":"epyc_7351_firmware"},{"vendor":"amd","product":"epyc_7351p_firmware"},{"vendor":"amd","product":"epyc_7352_firmware"},{"vendor":"amd","product":"epyc_7371_firmware"},{"vendor":"amd","product":"epyc_7401_firmware"},{"vendor":"amd","product":"epyc_7401p_firmware"},{"vendor":"amd","product":"epyc_7402_firmware"},{"vendor":"amd","product":"epyc_7402p_firmware"},{"vendor":"amd","product":"epyc_7451_firmware"},{"vendor":"amd","product":"epyc_7452_firmware"},{"vendor":"amd","product":"epyc_7501_firmware"},{"vendor":"amd","product":"epyc_7502_firmware"},{"vendor":"amd","product":"epyc_7502p_firmware"},{"vendor":"amd","product":"epyc_7532_firmware"},{"vendor":"amd","product":"epyc_7542_firmware"},{"vendor":"amd","product":"epyc_7551_firmware"},{"vendor":"amd","product":"epyc_7551p_firmware"},{"vendor":"amd","product":"epyc_7552_firmware"},{"vendor":"amd","product":"epyc_7571_firmware"},{"vendor":"amd","product":"epyc_7601_firmware"},{"vendor":"amd","product":"epyc_7642_firmware"},{"vendor":"amd","product":"epyc_7662_firmware"},{"vendor":"amd","product":"epyc_7702_firmware"},{"vendor":"amd","product":"epyc_7702p_firmware"},{"vendor":"amd","product":"epyc_7742_firmware"},{"vendor":"amd","product":"epyc_7f32_firmware"},{"vendor":"amd","product":"epyc_7f52_firmware"},{"vendor":"amd","product":"epyc_7f72_firmware"},{"vendor":"amd","product":"epyc_7h12_firmware"},{"vendor":"amd","product":"ryzen™ 2000 series desktop processors “pinnacle ridge”"},{"vendor":"amd","product":"ryzen™ 2000 series desktop processors “raven ridge” am4"},{"vendor":"amd","product":"ryzen™ 2000 series mobile processors “raven ridge” fp5"},{"vendor":"amd","product":"ryzen™ 3000 series desktop processors “matisse” am4"},{"vendor":"amd","product":"ryzen™ 3000 series mobile processor, 2nd gen amd ryzen™ mobile processors with radeon™ graphics “picasso”"},{"vendor":"amd","product":"ryzen™ threadripper™ pro processors “castle peak” ws"}],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26406"},{"url":"https://github.com/advisories/GHSA-r2pm-cwg9-cpwh"}],"sources":{"cve":[{"id":"CVE-2021-26406","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","status":"published","published":"2023-05-09T18:59:29.119Z","modified":"2025-01-28T15:44:16.511Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-13212","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","status":"published","published":"2023-05-09T18:59:29Z","modified":"2025-01-28T15:44:16Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:04:11.814906Z"}],"ghsa":[{"id":"GHSA-r2pm-cwg9-cpwh","title":"Insufficient validation in parsing Owner's\nCertificate Authority (OCA) certificates in SEV (AMD...","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","status":"published","published":"2023-05-09T21:30:23Z","modified":"2024-04-04T03:57:18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:56:20.113325Z"}],"nvd":[{"id":"CVE-2021-26406","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","status":"published","published":"2023-05-09T19:15:10.943Z","modified":"2026-06-17T03:43:20.6Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}