What’s Vulnerable › Vulnerabilities

CVE-2021-26406

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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 validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service.

Affected products

• AMD Epyc 7232P Firmware: romepi_1.0.0.a
• AMD Epyc 7251 Firmware: naplespi_1.0.0.e
• AMD Epyc 7252 Firmware: romepi_1.0.0.a
• AMD Epyc 7261 Firmware: naplespi_1.0.0.e
• AMD Epyc 7262 Firmware: romepi_1.0.0.a
• AMD Epyc 7272 Firmware: romepi_1.0.0.a
• AMD Epyc 7281 Firmware: naplespi_1.0.0.e
• AMD Epyc 7282 Firmware: romepi_1.0.0.a
• AMD Epyc 7301 Firmware: naplespi_1.0.0.e
• AMD Epyc 7302 Firmware: romepi_1.0.0.a
• AMD Epyc 7302P Firmware: romepi_1.0.0.a
• AMD Epyc 7351 Firmware: naplespi_1.0.0.e
• AMD Epyc 7351P Firmware: naplespi_1.0.0.e
• AMD Epyc 7352 Firmware: romepi_1.0.0.a
• AMD Epyc 7371 Firmware: naplespi_1.0.0.e
• AMD Epyc 7401 Firmware: naplespi_1.0.0.e
• AMD Epyc 7401P Firmware: naplespi_1.0.0.e
• AMD Epyc 7402 Firmware: romepi_1.0.0.a
• AMD Epyc 7402P Firmware: romepi_1.0.0.a
• AMD Epyc 7451 Firmware: naplespi_1.0.0.e
• AMD Epyc 7452 Firmware: romepi_1.0.0.a
• AMD Epyc 7501 Firmware: naplespi_1.0.0.e
• AMD Epyc 7502 Firmware: romepi_1.0.0.a
• AMD Epyc 7502P Firmware: romepi_1.0.0.a
• AMD Epyc 7532 Firmware: romepi_1.0.0.a
• AMD Epyc 7542 Firmware: romepi_1.0.0.a
• AMD Epyc 7551 Firmware: naplespi_1.0.0.e
• AMD Epyc 7551P Firmware: naplespi_1.0.0.e
• AMD Epyc 7552 Firmware: romepi_1.0.0.a
• AMD Epyc 7571 Firmware: naplespi_1.0.0.e

References

• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001

Get alerted when CVE-2021-26406 or the next vulnerability affects your stack