For additional context, since the gp mentioned that:
> the OpenBSD folks, who have a shockingly good track record
Not only is OpenSSH a BSD project, but so is LibreSSL (the OpenSSL fork that was a response to Heartbleed). Before LibreSSL, BSD folk were also working on assl - similarly an OpenSSL alternative motivated by the BSD guys having concerns about OpenSSL's codebase. So they very much have a solid track record of being pro-actively on top of this type of stuff.