CVE-2026-18664

NSD (Name Server Daemon) by NLnet Labs contains an endianness bug in its ACL range comparison logic. On little-endian systems, IPv4 and IPv6 addresses are compared against access-control ranges (e.g., 1.2.3.4–1.2.3.25) using host endianness, while the values are stored in network byte order (big-...