CVE-2026-18916

NameCVE-2026-18916
DescriptionAny 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
nsd (PTS)bookworm4.6.1-1vulnerable
trixie4.12.0-1vulnerable
forky, sid4.15.2-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
nsdsource(unstable)4.15.1-1

Notes

https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-18916.txt

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