CVE-2024-56374 Potential denial-of-service in IPv6 validation

Hi IBB :) in Django i found a potential Dos in IPv6 validation. Due to Lack of upper bound limit enforcement in strings passed in IPv6 validation(`is_valid_ipv6_address,clean_ipv6_address` methods) ,when a large malformed string with repeatable `:` characters like, `abcd:abcd:abcd:.....` is passed that cause huge resource consumption and slower processing which results in denial-of-service attack . you can see my cve (CVE-2024-56374) with Security Advisory here: https://www.djangoproject.com/weblog/2025/jan/14/security-releases/ ## Impact With large malformed string passed for IPv6 validation can perform denial-of-service attack.