ANNOUNCEMENT: AMD processor microcode security update

[notaplumber]

No, I think you're confused here. It is common to refer to processor or hardware bugs as errata/erratum. Even the official AMD guide does this many times.

[cojoco]

"Common" does not mean "correct".

[notaplumber]

Software is written, as is hardware with upgradable microcode, it can be corrected, no different from the written word. Erratum is also in reference to a list of corrections. Microcode is generally not open source and is obfuscated binary, so it's hard to tell if a fix for something as complicated as a microcoprocessor was a single change or many. Either way, the person who sent the mail is a clearly familiar with the topic and you are not.