CVE-2026-39155

Knot DNS before 3.4.10 and 3.5.x before 3.5.4 contains a vulnerability in mod-onlinesign where the next NSEC owner name can be computed incorrectly. This can create an overly broad authenticated denial interval, allowing downstream validating resolvers using aggressive negative caching to...

CVE-2026-11622

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the...

unbound: Unbound domain hijacking via promiscuous records

A domain hijacking flaw has been discovered in NLNet Lab's Unbound project. Promiscuous NS RRSets that complement positive DNS replies in the authority section can be used to trick resolvers to update their delegation information for the zone. Usually these RRSets are used to update the resolver'...

CVE-2023-28451

An issue was discovered in Technitium 11.0.2. There is a vulnerability called BadDNS in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing DoS denial of service for normal resolution. The effects of an exploit would be widespread and highly impactful, becaus...

CVE-2024-12705

Clients using DNS-over-HTTPS DoH can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic. This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1...