Comment 3 for bug 1911959

For the record: systems with firmware outdated enough to actually hit this microcode update issue *most likely* have several other critical security issues in their Intel platform, not just in the processor.

The outdated firmware not only blocks you from updating the processor microcode (thus several processor issues remain), but also very likely has vulnerabilities in other platform components such as the Intel Management Engine.

It is your decision to keep your system running like that, but please ensure you actually understand the risks you are taking: review the missing firmware update changelogs/advisories/release notes in your system vendor's website to understand which fixes you are missing, and also check the running processor microcode version to understand which processor microcode fixes you are missing.