The vulnerability stems from improper handling of DNS record set sizes during response generation. The CWE-835 (infinite loop) and advisory descriptions explicitly mention the mDNS component entering an infinite loop when processing oversized records. The '_do_process_query' method in the mdns handler is the logical point where DNS query processing and response rendering occur. The absence of size checks and packet splitting logic in this function would directly cause the infinite loop described in CVE-2015-5694. While the exact code isn't shown, the component (designate-mdns) and attack pattern match this function's responsibilities.