CVE-2026-19667

A flaw was found in bind9's named component. A remote attacker, by sending a specially crafted DNS negative answer of exactly 65536 bytes from an authoritative server, can cause a 16-bit length truncation. This results in a zero-byte negative cache entry. When named attempts to read this invalid...

CVE-2026-19667

CVE-2026-19667 is a remote assertion failure in the BIND 9 named daemon, caused by a 16-bit length truncation in dns_ncache_add(). When an attacker-controlled authoritative server returns a negative answer of exactly 65536 bytes , the negative cache entry is stored as 0 bytes; reading that entry ...