HIGH 8.2 NVD

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 Co

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.

References

https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-19401.txt

Published: 2026-08-26 · Source: NVD · Feed updated: 2026-08-26

This high severity vulnerability with a CVSS score of 8.2 was published on 2026-08-26 via NVD.

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