[rofex]

Sorry to be daft, but hasn't the Google Zero team jumped the gun on the coordinated disclosure date by publishing their blog post 6 days in advance?

[Pharaoh2]

Some researchers had independently create and demonstrated working PoC based on the linux patches they saw which read kernel memory from user space. At that point it was already public.

After that its all about PR and getting people prepared for the magnitude and impact early.

Also to let people know that patches that were already available can be used (restarting GCP/AWS instances, SPI on chrome).