{"id":"CVE-2026-40668","aliases":["EUVD-2026-123042"],"status":"published","description":"Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.","severity":{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-290"],"published":"2026-11-10T22:11:05Z","modified":"2026-11-10T22:11:05Z","products":[{"vendor":"amd","product":"amd epyc™ 7003 series processors"},{"vendor":"amd","product":"amd epyc™ 8004 series processors"},{"vendor":"amd","product":"amd epyc™ 8005 series processors"},{"vendor":"amd","product":"amd epyc™ 9004 series processors"},{"vendor":"amd","product":"amd epyc™ 9005 series processors"},{"vendor":"amd","product":"amd epyc™ embedded 7003 series processors"},{"vendor":"amd","product":"amd epyc™ embedded 8004 series processors"},{"vendor":"amd","product":"amd epyc™ embedded 9004  series processors (formerly codenamed \"genoa\")"},{"vendor":"amd","product":"amd epyc™ embedded 9004 series processors (formerly codenamed \"bergamo\")"},{"vendor":"amd","product":"amd epyc™ embedded 9005 series processors"}],"references":[{"url":"https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html"}],"sources":{"cve":[{"id":"CVE-2026-40668","description":"Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.","status":"published","published":"2026-11-10T22:11:05.184Z","modified":"2026-11-10T22:11:05.184Z","cvss":[{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-290"],"updated_at":"2026-11-10T23:49:28.582338Z"}],"euvd":[{"id":"EUVD-2026-123042","description":"Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.","status":"published","published":"2026-11-10T22:11:05Z","modified":"2026-11-10T22:11:05Z","cvss":[{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-10T23:24:16.163953Z"}]}}