CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS amplification attacks.)
https://www.akamai.com/blog/security-research/october-cups-ddos-threat
https://github.com/OpenPrinting/cups-filters/security/advisories/GHSA-rq86-c7g6-r2h8