CVE-2023-20528: AMD Epyc 7002 Firmware

Low severity, CVSS 2.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leading to a loss of confidentiality.

Affected products

AMD Epyc 7002 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7003 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7232p Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7252 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7262 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7272 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7282 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 72f3 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7302 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7302p Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
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 7352 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
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 7402 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
AMD Epyc 7402p Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
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 7452 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
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 7502 Firmware: before romepi_1.0.0.c (fixed in romepi_1.0.0.c)
and 25 more

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