CVE-2021-26353: AMD Epyc 72f3 Firmware

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.

Affected products

• AMD Epyc 72f3 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7313 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7313p Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7343 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7373x Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 73f3 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7413 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7443 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7443p Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7453 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7473x Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 74f3 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7513 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7543 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7543p Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7573x Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 75f3 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7643 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7663 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7713 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7713p Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7763 Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)
• AMD Epyc 7773x Firmware: before milanpi-sp3_1.0.0.4 (fixed in milanpi-sp3_1.0.0.4)

Published 2022-05-10. Last modified 2026-06-17.