What’s Vulnerable › Vulnerabilities

CVE-2020-12966

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-04 · updated 2026-06-17
• Weakness: CWE-200

Description

AMD EPYC™ Processors contain an information disclosure vulnerability in the Secure Encrypted Virtualization with Encrypted State (SEV-ES) and Secure Encrypted Virtualization with Secure Nested Paging (SEV-SNP). A local authenticated attacker could potentially exploit this vulnerability leading to leaking guest data by the malicious hypervisor.

Affected products

• AMD Epyc 7001 Firmware: all versions
• AMD Epyc 7002 Firmware: all versions
• AMD Epyc 7003 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7232P Firmware: all versions
• AMD Epyc 7251 Firmware: all versions
• AMD Epyc 7252 Firmware: all versions
• AMD Epyc 7261 Firmware: all versions
• AMD Epyc 7262 Firmware: all versions
• AMD Epyc 7272 Firmware: all versions
• AMD Epyc 7281 Firmware: all versions
• AMD Epyc 7282 Firmware: all versions
• AMD Epyc 72F3 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7301 Firmware: all versions
• AMD Epyc 7302 Firmware: all versions
• AMD Epyc 7302P Firmware: all versions
• AMD Epyc 7313 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7313P Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7343 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7351 Firmware: all versions
• AMD Epyc 7351P Firmware: all versions
• AMD Epyc 7352 Firmware: all versions
• AMD Epyc 7371 Firmware: all versions
• AMD Epyc 73F3 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7401 Firmware: all versions
• AMD Epyc 7401P Firmware: all versions
• AMD Epyc 7402 Firmware: all versions
• AMD Epyc 7402P Firmware: all versions
• AMD Epyc 7413 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7443 Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5
• AMD Epyc 7443P Firmware: before milanpi-sp3_1.0.0.5 — fixed in milanpi-sp3_1.0.0.5

How to fix

Upgrade to a fixed version: AMD Epyc 7003 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 72F3 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7313 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7313P Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7343 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 73F3 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7413 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7443 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7443P Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7453 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 74F3 Firmware milanpi-sp3_1.0.0.5; AMD Epyc 7513 Firmware milanpi-sp3_1.0.0.5. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2022/08/08/6
• https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1013
• http://www.openwall.com/lists/oss-security/2022/08/08/6
• https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1013

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