What’s Vulnerable › Vulnerabilities

CVE-2021-26379

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-09 · updated 2026-06-17

Description

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
• AMD Epyc 7513 Firmware: before milanpi_1.0.0.9 — fixed in milanpi_1.0.0.9
• AMD Epyc 7532 Firmware: before romepi_1.0.0.e — fixed in romepi_1.0.0.e
• AMD Epyc 7542 Firmware: before romepi_1.0.0.e — fixed in romepi_1.0.0.e
• AMD Epyc 7543 Firmware: before milanpi_1.0.0.9 — fixed in milanpi_1.0.0.9
• AMD Epyc 7543P Firmware: before milanpi_1.0.0.9 — fixed in milanpi_1.0.0.9

How to fix

Upgrade to a fixed version: AMD Epyc 7232P Firmware romepi_1.0.0.e; AMD Epyc 7252 Firmware romepi_1.0.0.e; AMD Epyc 7262 Firmware romepi_1.0.0.e; AMD Epyc 7272 Firmware romepi_1.0.0.e; AMD Epyc 7282 Firmware romepi_1.0.0.e; AMD Epyc 72F3 Firmware milanpi_1.0.0.9; AMD Epyc 7302 Firmware romepi_1.0.0.e; AMD Epyc 7302P Firmware romepi_1.0.0.e; AMD Epyc 7313 Firmware milanpi_1.0.0.9; AMD Epyc 7313P Firmware milanpi_1.0.0.9; AMD Epyc 7343 Firmware milanpi_1.0.0.9; AMD Epyc 7352 Firmware romepi_1.0.0.e. Check the vendor advisory for mitigations.

References

• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001

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