{"id":"CVE-2021-26379","aliases":["EUVD-2021-13185","GHSA-fqxf-xxpp-6pq8"],"status":"published","title":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU...","description":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially\nleading to a loss of integrity and privilege escalation.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00683,"percentile":0.53005,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2023-05-09T18:36:18Z","modified":"2026-06-17T03:43:16Z","products":[{"vendor":"amd","product":"2nd gen amd epyc™"},{"vendor":"amd","product":"3rd gen amd epyc™"},{"vendor":"amd","product":"epyc_7232p_firmware"},{"vendor":"amd","product":"epyc_7252_firmware"},{"vendor":"amd","product":"epyc_7262_firmware"},{"vendor":"amd","product":"epyc_7272_firmware"},{"vendor":"amd","product":"epyc_7282_firmware"},{"vendor":"amd","product":"epyc_72f3_firmware"},{"vendor":"amd","product":"epyc_7302_firmware"},{"vendor":"amd","product":"epyc_7302p_firmware"},{"vendor":"amd","product":"epyc_7313_firmware"},{"vendor":"amd","product":"epyc_7313p_firmware"},{"vendor":"amd","product":"epyc_7343_firmware"},{"vendor":"amd","product":"epyc_7352_firmware"},{"vendor":"amd","product":"epyc_7373x_firmware"},{"vendor":"amd","product":"epyc_73f3_firmware"},{"vendor":"amd","product":"epyc_7402_firmware"},{"vendor":"amd","product":"epyc_7402p_firmware"},{"vendor":"amd","product":"epyc_7413_firmware"},{"vendor":"amd","product":"epyc_7443_firmware"},{"vendor":"amd","product":"epyc_7443p_firmware"},{"vendor":"amd","product":"epyc_7452_firmware"},{"vendor":"amd","product":"epyc_7453_firmware"},{"vendor":"amd","product":"epyc_7473x_firmware"},{"vendor":"amd","product":"epyc_74f3_firmware"},{"vendor":"amd","product":"epyc_7502_firmware"},{"vendor":"amd","product":"epyc_7502p_firmware"},{"vendor":"amd","product":"epyc_7513_firmware"},{"vendor":"amd","product":"epyc_7532_firmware"},{"vendor":"amd","product":"epyc_7542_firmware"},{"vendor":"amd","product":"epyc_7543_firmware"},{"vendor":"amd","product":"epyc_7543p_firmware"},{"vendor":"amd","product":"epyc_7552_firmware"},{"vendor":"amd","product":"epyc_7573x_firmware"},{"vendor":"amd","product":"epyc_75f3_firmware"},{"vendor":"amd","product":"epyc_7642_firmware"},{"vendor":"amd","product":"epyc_7643_firmware"},{"vendor":"amd","product":"epyc_7662_firmware"},{"vendor":"amd","product":"epyc_7663_firmware"},{"vendor":"amd","product":"epyc_7702_firmware"},{"vendor":"amd","product":"epyc_7702p_firmware"},{"vendor":"amd","product":"epyc_7713_firmware"},{"vendor":"amd","product":"epyc_7713p_firmware"},{"vendor":"amd","product":"epyc_7742_firmware"},{"vendor":"amd","product":"epyc_7763_firmware"},{"vendor":"amd","product":"epyc_7773x_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"}],"references":[{"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-2021-26379"},{"url":"https://github.com/advisories/GHSA-fqxf-xxpp-6pq8"}],"sources":{"cve":[{"id":"CVE-2021-26379","description":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially\nleading to a loss of integrity and privilege escalation.\n\n\n\n","status":"published","published":"2023-05-09T18:36:18.303Z","modified":"2025-01-28T16:02:38.949Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-13185","description":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially\nleading to a loss of integrity and privilege escalation.\n\n\n\n","status":"published","published":"2023-05-09T18:36:18Z","modified":"2025-01-28T16:02:38Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:04:11.289823Z"}],"ghsa":[{"id":"GHSA-fqxf-xxpp-6pq8","title":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU...","description":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially\nleading to a loss of integrity and privilege escalation.\n\n\n\n","status":"published","published":"2023-05-09T21:30:22Z","modified":"2024-04-04T03:57:13Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T14:56:20.113325Z"}],"nvd":[{"id":"CVE-2021-26379","description":"Insufficient input validation of mailbox data in the\nSMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially\nleading to a loss of integrity and privilege escalation.\n\n\n\n","status":"published","published":"2023-05-09T19:15:10.863Z","modified":"2026-06-17T03:43:16.857Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}