CVE-2021-26404: AMD Epyc 7003 Firmware

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.

Affected products

AMD Epyc 7003 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7313 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7313p Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7343 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7373x Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 73f3 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7413 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7443 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7443p Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7453 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7473x Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 74f3 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7513 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7543 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7543p Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7573x Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 75f3 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7643 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7663 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7713 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7713p Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7763 Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)
AMD Epyc 7773x Firmware: before milanpi-sp3_1.0.0.9 (fixed in milanpi-sp3_1.0.0.9)

Published 2023-01-11. Last modified 2026-06-17.