Vulnerability Details CVE-2026-19401
Any remote client can crash a (debugging/non-release build type) NSD serve child by sending it a special crafted message with a specially tuned number of DNS Cookie options (17 when UDP payload size is 512). By continuously crashing the serve childs, the remote client can severely hamper or, when positioned sufficiently close, deny all DNS service.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 25.9%
CVSS Severity