QID 370433 is detected on all my BSD hosts, all of which are 11.2-RELEASE-p4 or later. I have downloaded all the PoC code from ExploitDB and tested it against these hosts and have seen no evidence of privilege escalation. Even the threat description seems off:
THREAT:It was detected that FreeBSD kernel/ glibc components are prone to a elevation of privilege vulnerability.
FreeBSD does not have glibc - glibc is a linux library.
If I follow the BugTrack links from the detection info none of those links refer back to BSD - only linux and solaris.
I think this QID might require review / QA as it pertains to BSD.
You should put a ticket in with support. Upload documentation of your rationale. While it is usually a pain to get it past support (they want scan results which I think is a waste of time if I have rationalized why their detection is wrong and they should be able to easily replicate but I won't get on that train right now...), once they kick the ticket to engineering they usually take care of it pretty kick. Bugging your tam to escalate the ticket can also sometimes help get you to engineering quicker.