CVE-2026-3591 A stack use-after-return flaw in SIG(0) handling code may enable ACL bypass

A use-after-return vulnerability exists in the named server when handling DNS queries signed with SIG0. Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly mismatch an IP address. In a default-allow ACL denying only specific IP addresses, this may lead to...