{"id":"CVE-2021-26408","aliases":["EUVD-2021-13214","GHSA-q49c-2cmm-mw74"],"status":"published","title":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy...","description":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00269,"percentile":0.19322,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-05-10T18:22:50Z","modified":"2026-06-17T03:43:20Z","products":[{"vendor":"amd","product":"1st gen amd epyc™"},{"vendor":"amd","product":"2nd gen amd epyc™"},{"vendor":"amd","product":"epyc_7001_firmware"},{"vendor":"amd","product":"epyc_7002_firmware"},{"vendor":"amd","product":"epyc_7232p_firmware"},{"vendor":"amd","product":"epyc_7251_firmware"},{"vendor":"amd","product":"epyc_7252_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_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_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"}],"references":[{"url":"https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26408"},{"url":"https://github.com/advisories/GHSA-q49c-2cmm-mw74"}],"sources":{"cve":[{"id":"CVE-2021-26408","description":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.","status":"published","published":"2022-05-10T18:22:50.329Z","modified":"2024-09-16T21:04:07.585Z","updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-13214","description":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.","status":"published","published":"2022-05-10T18:22:50Z","modified":"2024-09-16T21:04:07Z","updated_at":"2026-11-03T00:55:08.578591Z"}],"ghsa":[{"id":"GHSA-q49c-2cmm-mw74","title":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy...","description":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.","status":"published","published":"2022-05-11T00:01:17Z","modified":"2023-02-01T05:02:08Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T14:49:51.128354Z"}],"nvd":[{"id":"CVE-2021-26408","description":"Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.","status":"published","published":"2022-05-10T19:15:08.92Z","modified":"2026-06-17T03:43:20.957Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":6.6,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:06.029737Z"}]}}