CVE-2026-18916
published 2026-08-26CVE-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…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.36%
29.5th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| nlnet_labs | nsd | >= 3.2.11 < 4.15.1 | 4.15.1 |
| nlnetlabs | nsd | >= 3.2.11 < 4.15.1 | 4.15.1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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Bugzilla
CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling
bugzilla·2026-08-26·CVSS 6.9
CVE-2026-18916 [MEDIUM] CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling
CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling
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.
Bugzilla
CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling [epel-all]
bugzilla·2026-08-26·CVSS 6.9
CVE-2026-18916 [MEDIUM] CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling [epel-all]
CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling [fedora-all]
bugzilla·2026-08-26·CVSS 6.9
CVE-2026-18916 [MEDIUM] CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling [fedora-all]
CVE-2026-18916 nsd: NSD: Denial of Service due to TCP receive window throttling [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
2026-08-26
Published