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CVE-2026-45673 is a DNS cache poisoning vulnerability in Netty's DNS resolver module. In affected versions prior to 4.1.135.Final and 4.2.15.Final, the resolver generates DNS transaction IDs using a predictable pseudo-random number generator and, by default, reuses a static UDP source port for DNS queries. This collapses the effective entropy that normally protects DNS request/response matching and makes classic Kaminsky-style spoofing attacks feasible. An attacker able to predict transaction IDs and race or inject forged DNS replies can cause the resolver to accept malicious responses and cache attacker-controlled resolution data.
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16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A DNS cache poisoning vulnerability in Netty's DNS resolver caused by entropy collapse from a static UDP source port and predictable TXIDs, making spoofed DNS responses feasible.
A companion Netty DNS resolver vulnerability involving predictable PRNG behavior and a default static source port that can facilitate DNS cache poisoning and be chained with CVE-2026-45674.
A Netty DNS resolver cache-poisoning vulnerability caused by predictable DNS transaction IDs and a static UDP source port.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.