CVE-2021-46774: AMD Epyc 7001 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 7001 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7203 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7203p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7232p Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7251 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7252 Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7261 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7262 Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7272 Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7281 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7282 Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 72f3 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7301 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7302 Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7302p Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7303 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7303p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7313 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7313p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7343 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7351 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7351p Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7352 Firmware: before romepi_1.0.0.g (fixed in romepi_1.0.0.g)
AMD Epyc 7371 Firmware: before naplespi_1.0.0.k (fixed in naplespi_1.0.0.k)
AMD Epyc 7373x Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
and 112 more

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