Since this is about Linux, the microcodes it applies on boot can be found in the linux-firmware repository. For AMD microcode, in particular https://git.kernel.

Since this is about Linux, the microcodes it applies on boot can be found in the linux-firmware repository. For AMD microcode, in particular https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/amd-ucode https://git.kernel.org/pub/scm/linux/kernel/git/firmware/lin... However, for some unexplainable reason AMD doesn't tend to update the microcodes in that repo particularly often, leaving it up to BIOS vendors and users updating their BIOS.