CVE-2026-18916
Remote TCP DoS by throttling the TCP receive window
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Reserved
- Aug 5, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | NLnet Labs |
Weaknesses
- CWE-191 Integer Underflow
Affected Products
| Product | Versions |
|---|---|
NSDNLnet Labs |
|
References
- https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-18916.txtvendor-advisory
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