What’s Vulnerable › Vulnerabilities

CVE-2021-26409

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-11 · updated 2026-06-17
• Weakness: CWE-120

Description

Insufficient bounds checking in SEV-ES may allow an attacker to corrupt Reverse Map table (RMP) memory, potentially resulting in a loss of SNP (Secure Nested Paging) memory integrity.

Affected products

• AMD Milanpi Firmware: before 1.0.0.3 — fixed in 1.0.0.3

How to fix

Upgrade to a fixed version: AMD Milanpi Firmware 1.0.0.3. Check the vendor advisory for mitigations.

References

• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032

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