What’s Vulnerable › Vulnerabilities

CVE-2023-20566

• 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: 2023-11-14 · updated 2026-06-17

Description

Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity.

Affected products

• AMD Epyc 7203 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7203P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 72F3 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7303 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7303P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7313 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7313P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7343 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7373X Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 73F3 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7413 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7443 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7443P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7453 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7473X Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 74F3 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7513 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7543 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7543P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7573X Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 75F3 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7643 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7643P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7663 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7663P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7713 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7713P Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7763 Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 7773X Firmware: before milanpi_1.0.0.b — fixed in milanpi_1.0.0.b
• AMD Epyc 8024P Firmware: before genoapi_1.0.0.7 — fixed in genoapi_1.0.0.7

How to fix

Upgrade to a fixed version: AMD Epyc 7203 Firmware milanpi_1.0.0.b; AMD Epyc 7203P Firmware milanpi_1.0.0.b; AMD Epyc 72F3 Firmware milanpi_1.0.0.b; AMD Epyc 7303 Firmware milanpi_1.0.0.b; AMD Epyc 7303P Firmware milanpi_1.0.0.b; AMD Epyc 7313 Firmware milanpi_1.0.0.b; AMD Epyc 7313P Firmware milanpi_1.0.0.b; AMD Epyc 7343 Firmware milanpi_1.0.0.b; AMD Epyc 7373X Firmware milanpi_1.0.0.b; AMD Epyc 73F3 Firmware milanpi_1.0.0.b; AMD Epyc 7413 Firmware milanpi_1.0.0.b; AMD Epyc 7443 Firmware milanpi_1.0.0.b. Check the vendor advisory for mitigations.

References

• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002
• https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002

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