CVE-2025-40777

If a named caching resolver is configured with serve-stale-enable yes, and with stale-answer-client-timeout set to 0 the only allowable value other than disabled, and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or...

UBUNTU-CVE-2023-2911

If the recursive-clients quota is reached on a BIND 9 resolver configured with both stale-answer-enable yes; and stale-answer-client-timeout 0;, a sequence of serve-stale-related lookups could cause named to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versio...

bind: BIND 9 resolvers configured to answer from cache with zero stale-answer-timeout may terminate unexpectedly

A flaw was found in the Bind package, where the resolver can crash when stale cache and stale answers are enabled, option stale-answer-client-timeout is set to 0 and there is a stale CNAME in the cache for an incoming query. By sending specific queries to the resolver, an attacker can cause named...