CVE-2023-20533: AMD Epyc 7203 Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.

Affected products

AMD Epyc 7203 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7203p Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7232p Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
AMD Epyc 7252 Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
AMD Epyc 7262 Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
AMD Epyc 7272 Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
AMD Epyc 7282 Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
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.d (fixed in romepi_1.0.0.d)
AMD Epyc 7302p Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
AMD Epyc 7303 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
AMD Epyc 7303p 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 7352 Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
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.d (fixed in romepi_1.0.0.d)
AMD Epyc 7402p Firmware: before romepi_1.0.0.d (fixed in romepi_1.0.0.d)
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.d (fixed in romepi_1.0.0.d)
AMD Epyc 7453 Firmware: before milanpi_1.0.0.5 (fixed in milanpi_1.0.0.5)
and 60 more

Published 2023-11-14. Last modified 2026-06-17.