Why would Ubuntu need to be notified? Fixes for this are going to be at the Linux Kernel level or (at most) Debian upstream. Canonical shouldn't need to do anything?
If some fixes can be applied via microcode, then the distros will have to be provided the updated microcode. The kernel (mostly) does not handle CPU microcode distribution.
>To address the issue, updates to the Ubuntu kernel and processor microcode will be needed. These updates will be announced in future Ubuntu Security Notices once they are available.
