CVE-2026-40719
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose...
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
CVE-2026-40719- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-670
- Updated
- 2026-11-02
EUVDEUVD-2026-22839
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
EUVD-2026-22839- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-8wr7-69hr-44pw
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose...
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
GHSA-8wr7-69hr-44pw- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-670
- Updated
- 2026-11-02
NVD
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
CVE-2026-40719- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-670
- Updated
- 2026-11-02
OSV
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
CVE-2026-40719- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-670
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-40719
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
DEBIAN-CVE-2026-40719- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-40719
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
- Record
UBUNTU-CVE-2026-40719- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
maradnsDebian:11 |
All versions, plus listed versions 2.0.13-1.42.0.13-1.4+deb11u12.0.13-1.52.0.13-1.6 |
None known |
maradnsUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.0.11-12.0.13-12.0.13-1ubuntu0.1~esm1 |
None known |
maradnsUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.0.13-1.22.0.13-1.2ubuntu0.1~esm1 |
None known |
maradnsUbuntu:20.04:LTS |
All versions, plus listed versions 2.0.13-1.2build12.0.13-1.42.0.13-1.4build12.0.13-1.4+deb11u1build0.20.04.1 |
None known |
maradnsUbuntu:22.04:LTS |
All versions, plus listed versions 2.0.13-1.4build22.0.13-1.4+deb11u1build0.22.04.1 |
None known |
maradnsUbuntu:24.04:LTS |
All versions, plus listed versions 2.0.13-1.4ubuntu12.0.13-1.52.0.13-1.6 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-40719 is a high vulnerability (CVSS 7.5) in Maradns, published April 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 31st percentile. No source names a fixed version.
References
github.com/samboy/MaraDNS/security/advisories/GHSA-cfc6-vhrv-62cj
maradns.samiam.org/changelog.html
nvd.nist.gov/vuln/detail/CVE-2026-40719
security-tracker.debian.org/tracker/CVE-2026-40719
ubuntu.com/security/CVE-2026-40719
cve.org/CVERecord?id=CVE-2026-40719