CVE-2023-20591

Severity: critical (CVSS 10.0 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: 2024-08-13 · updated 2026-06-17
Weakness: CWE-665

Description

Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform configuration to persist, allowing an attacker to read or modify hypervisor memory, potentially resulting in loss of confidentiality, integrity, and availability.

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_1.0.0.8 — fixed in genoapi_1.0.0.8

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/resources/product-security/bulletin/amd-sb-3003.html

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