CVE-2026-18916
CVE-2026-18916 · Remote TCP DoS by throttling the TCP receive window
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.9 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
nsd
- Versions
- ≥ 3.2.11, < 4.15.1: Affected (semver)
Update to 4.15.1
nsd Debian:12
- Versions
- 4.10.1-1
- 4.10.1~rc2-1
- 4.10.1~rc2-2
- 4.11.0-1
- 4.11.1-1
- 4.12.0-1
- 4.12.0-2
- 4.13.0-1
- 4.13.0-2
- 4.13.0-3
- 4.13.0-4
- 4.13.0-5
- 4.13.0-6
- 4.14.0-1
- 4.14.1-1
- 4.14.2-1
- 4.14.3-1
- 4.15.0-1
- 4.15.0~rc1-1
- 4.15.1-1
- 4.15.2-1
- 4.6.1-1
- 4.7.0-1
- 4.8.0-1
- 4.9.1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Debian:13
- Versions
- 4.12.0-1
- 4.12.0-2
- 4.13.0-1
- 4.13.0-2
- 4.13.0-3
- 4.13.0-4
- 4.13.0-5
- 4.13.0-6
- 4.14.0-1
- 4.14.1-1
- 4.14.2-1
- 4.14.3-1
- 4.15.0-1
- 4.15.0~rc1-1
- 4.15.1-1
- 4.15.2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Debian:14
- Versions
- 4.12.0-1
- 4.12.0-2
- 4.13.0-1
- 4.13.0-2
- 4.13.0-3
- 4.13.0-4
- 4.13.0-5
- 4.13.0-6
- 4.14.0-1
- 4.14.1-1
- 4.14.2-1
- 4.14.3-1
- 4.15.0-1
- 4.15.0~rc1-1
- Affected ranges
- ECOSYSTEM: < 4.15.1-1
Update to 4.15.1-1
nsd Ubuntu:Pro:16.04:LTS
- Versions
- 4.1.2-1
- 4.1.6-1
- 4.1.7-1
- 4.1.7-1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Ubuntu:Pro:18.04:LTS
- Versions
- 4.1.16-1build1
- 4.1.17-1
- 4.1.17-1build1
- 4.1.17-1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Ubuntu:Pro:20.04:LTS
- Versions
- 4.1.26-1
- 4.1.26-1build1
- 4.1.26-1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Ubuntu:Pro:22.04:LTS
- Versions
- 4.3.5-1
- 4.3.7-1
- 4.3.8-1
- 4.3.8-1build1
- 4.3.9-1
- 4.3.9-1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Ubuntu:Pro:24.04:LTS
- Versions
- 4.7.0-1
- 4.8.0-1
- 4.8.0-1build1
- 4.8.0-1build3
- 4.8.0-1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Ubuntu:26.10
- Versions
- 4.14.0-1
- 4.14.2-1
- 4.14.3-1
- 4.15.0-1
- 4.15.0-1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
nsd Ubuntu:Pro:26.04:LTS
- Versions
- 4.12.0-1
- 4.13.0-6
- 4.14.0-1
- 4.14.0-1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published