The FreeBSD people were notified a week or so ago.
* https://www.freebsd.org/news/newsflash.html#event20180104:01
The Ubuntu people also got that same notification it appears, but were also secretly told by Intel in November 2017.
* https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAn... (https://news.ycombinator.com/item?id=16071769)
People are claiming that the OpenBSD people knew years ago, but what Theo de Raadt was discussing then was a list of published errata for the Core Duo. The bugs that are in the news right now were never published errata. I suspect that the OpenBSD people found out about them at the same time that the world at large did.