CVE-2021-46791

Severity: medium (CVSS 5.5 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-787

Description

Insufficient input validation during parsing of the System Management Mode (SMM) binary may allow a maliciously crafted SMM executable binary to corrupt Dynamic Root of Trust for Measurement (DRTM) user application memory that may result in a potential denial of service.

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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