FreeBSD's built-in DNS resolver is now Unbound 1.26.0
Brief
It is unknown whether the default local resolver hits those cases.
Notes
c555236ec76f8943cde1be109a75bf29d8b2671e on releng/14.5. Also 79cf64a2b8e1a3427a7ed133e132cfd747453c1f on stable/15 and ceb764f65dcdc7349abc0b27b934a89d2209180d on stable/14.
NLnet Labs 1.26.0 notes. Heap write on a large port count, heap use-after-free if two DNS classes are configured.
No FreeBSD-SA. The src commits are a vendor bump. Unknown whether default local_unbound hits those cases.
Commit c555236ec76f8943cde1be109a75bf29d8b2671e on releng/14.5; 79cf64a2b8e1a3427a7ed133e132cfd747453c1f on stable/15; ceb764f65dcdc7349abc0b27b934a89d2209180d on stable/14