Researchers from IOActive have reported that it may be possible for an attacker with ring 0 access to modify the configuration of System Management Mode (SMM) even when SMM Lock is enabled. Refer: https://www.amd.com/en/resources/product-security.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2024:5980 https://access.redhat.com/errata/RHSA-2024:5980
This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Advanced Update Support Via RHSA-2024:5982 https://access.redhat.com/errata/RHSA-2024:5982
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2024:5978 https://access.redhat.com/errata/RHSA-2024:5978
This issue has been addressed for RHEL 8.8 in https://access.redhat.com/errata/RHBA-2024:6202