There was a FreeBSD security advisory the same day. If this repository is the source https://github.com/freenas/os/tree/freenas/11.3-stable, then it looks like the patches are not included.
There was a FreeBSD security advisory the same day. If this repository is the source https://github.com/freenas/os/tree/freenas/11.3-stable, then it looks like the patches are not included.