Home/CVE/Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver addr
CVE

CVE-2026-40719

Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver addr

Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.

HIGH · CVSS 7.5 EPSS 0.00018
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-670Always-Incorrect Control Flow Implementation
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Apr 2026 · 07:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/samboy/MaraDNS/security/advisories/GHSA-cfc6-vhrv-62cj
https://maradns.samiam.org/changelog.html
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