CVE-2026-40719

EUVD-2026-22839
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 40.18%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
maradnsmaradns
3.5.36
CNA
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
maradns
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
dne
resolute
dne
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/samboy/MaraDNS/security/advisories/GHSA-cfc6-vhrv-62cj
https://maradns.samiam.org/changelog.html
https://github.com/samboy/MaraDNS/security/advisories/GHSA-cfc6-vhrv-62cj