nsd: Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query
CVE-2026-18916 is fixed in nsd on 1 platform by DEBIAN-CVE-2026-18916 (version 4.15.1-1), released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.
Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nsd · Debian 14 | 4.15.1-1 | DEBIAN-CVE-2026-18916 | Sep 4, 2026 |
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