Not 100% sure to be honest, but ASUS did just release last week a bios update for my mainboard after 1 year of no version change, which included this in the changelog:
Mitigate the AMD potential security vulnerabilities for AMD Athlon™ processors and Ryzen™ processors
ASUS did? I ask MSI do release a BIOS update, and these are the responses so far: https://forum-en.msi.com/index.php?threads/cve-2023-20593-zenbleed.387800/
Not 100% sure to be honest, but ASUS did just release last week a bios update for my mainboard after 1 year of no version change, which included this in the changelog: