All the security updates are in the microcode loaded by the bootloader even before the kernel is loaded, so unless there’s some new feature, bugfix, or hardware support you specifically know you need it’s not important to update your BIOS anyway. Which is good, because as far as I can tell you’re just screwed by a bad hardware vendor.
I mean, it’s not a group famous for their high rate of desktop computer use, but the ones that do actually make that a significant part of their life tend to be pretty likely to use Linux in my experience.