The Binarly efiXplorer team made AMD aware of a potential vulnerability in a display feature component in Client products (CpmDisplayFeatureSMM) where an attacker can rewrite a controlled pointer to point to SMRAM resulting in a one bit overwrite of SMRAM. Although this vulnerability could have high impact if exploited, AMD believes an attacker may have difficulty carrying out a meaningful attack since the vulnerability allows an attacker to manipulate only a single bit value in SMRAM. Reference: https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-4003