CVE catalog
CVE-2026-18916
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 N
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.46% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nsd | sid | 4.15.4-1 | fixed |
| Debian | nsd | forky | 4.15.4-1 | fixed |
| Debian | nsd | trixie | 4.12.0-1 | vulnerable |
| Debian | nsd | bookworm | 4.6.1-1 | vulnerable |
| Cpe | nsd | Not reported | 4.15.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nsd | source | sid | 4.15.1-1 | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | forky | 4.15.1-1 | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | nsd | cpe | Not reported | 4.15.1 | Not reported | NVD-CVE-2026-18916 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [nsd]Affected
Details (2)
4.6.1-1· amd64 · bookwormAffected
nvd · nsd · debian · bookworm; nvd · nsd · debian · 12
4.6.1-1· arm64 · bookwormAffected
nvd · nsd · debian · bookworm; nvd · nsd · debian · 12
[Debian 13 (Trixie)]
- [nsd]Affected
Details (2)
4.12.0-1· amd64 · trixieAffected
nvd · nsd · debian · 13
4.12.0-1· arm64 · trixieAffected
nvd · nsd · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-18916]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-18916]
- [https://security-tracker.debian.org/tracker/CVE-2026-18916]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-18916.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3663.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]