CVE-2023-20530: AMD Epyc 7003 Firmware

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Insufficient input validation of BIOS mailbox messages in SMU may result in out-of-bounds memory reads potentially resulting in a denial of service.

Affected products

AMD Epyc 7003 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 72f3 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7313 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7313p Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7343 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7373x Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 73f3 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7413 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7443 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7443p Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7453 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 74f3 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7513 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7543 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7543p Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7573x Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 75f3 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7643 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7663 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7713 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7713p Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7743 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7763 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7773x Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)

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