Here’s something I haven’t see before: at the time of me typing this, there are commits in DragonFly, FreeBSD, and I assume NetBSD (haven’t found the commit), but the 2019-5612 CVE entry is still shown as reserved and not public. This may change by the time you read this article, of course.
Update: the original source, found by an intrepid reader.
http://lists.dragonflybsd.org/pipermail/commits/2019-August/719329.html is the correct link for the DragonFly commit message.
Fixed link – I was clicking on the wrong bugfix.