CVE-2026-18916 Affecting nsd package, versions <4.15.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-NSD-19425063
- published29 Aug 2026
- disclosed26 Aug 2026
Introduced: 26 Aug 2026
NewCVE-2026-18916 (opens in a new tab)How to fix?
Upgrade Debian:unstable nsd to version 4.15.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nsd package and not the nsd package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.