CVE-2021-26328: AMD Epyc 7003 Firmware

Medium severity, CVSS 4.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.

Affected products

AMD Epyc 7003 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 72f3 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7313 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7313p Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7343 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7373x Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 73f3 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7413 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7443 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7443p Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7453 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 74f3 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7513 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7543 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7543p Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7573x Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 75f3 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7643 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7663 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7713 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7713p Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7743 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7763 Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)
AMD Epyc 7773x Firmware: before milanpi_1.0.0.8 (fixed in milanpi_1.0.0.8)

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