CVE-2021-26379: AMD Epyc 7232p Firmware

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Insufficient input validation of mailbox data in the SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially leading to a loss of integrity and privilege escalation.

Affected products

  • AMD Epyc 7232p Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7252 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7262 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7272 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7282 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 72f3 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7302 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7302p Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7313 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7313p Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7343 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7352 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7373x Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 73f3 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7402 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7402p Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7413 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7443 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7443p Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7452 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7453 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7473x Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 74f3 Firmware: before milanpi_1.0.0.9 (fixed in milanpi_1.0.0.9)
  • AMD Epyc 7502 Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • AMD Epyc 7502p Firmware: before romepi_1.0.0.e (fixed in romepi_1.0.0.e)
  • and 23 more

Published 2023-05-09. Last modified 2026-06-17.