CVE-2023-20578: AMD Epyc 7001 Firmware

Medium severity, CVSS 6.4. EPSS: 0.1% chance of exploitation in the next 30 days.

A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution.

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_1.0.0.5 (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.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_1.0.0.5 (fixed in milanpi_1.0.0.5)
• 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_1.0.0.5 (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 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_1.0.0.5 (fixed in milanpi_1.0.0.5)
• and 80 more

Published 2024-08-13. Last modified 2026-06-17.