CVE-2023-20566: AMD Epyc 7203 Firmware

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.

Affected products

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 72f3 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
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 7373x Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 73f3 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7413 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7443 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7443p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7453 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7473x Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 74f3 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7513 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7543 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7543p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7573x Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 75f3 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7643 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7643p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7663 Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
AMD Epyc 7663p Firmware: before milanpi_1.0.0.b (fixed in milanpi_1.0.0.b)
and 40 more

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