High severity7.5NVD Advisory· Published Aug 26, 2026· Updated Sep 8, 2026
CVE-2026-19401
CVE-2026-19401
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1Patches
Vulnerability mechanics
References
1- www.nlnetlabs.nl/downloads/nsd/CVE-2026-19401.txtnvdVendor Advisory
News mentions
0No linked articles in our index yet.