TI-2025-36672 Aliases CVE-2025-59030 GHSA-646x-553g-6v9h

Insufficient validation of incoming notifies over TCP can lead to a denial of service in Recursor

MEDIUM 40CWE-276Published 2025-12-09 · Updated 2025-12-09

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

An attacker can trigger the removal of cached records by sending a NOTIFY query over TCP.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00585 48th percentileScored 2026-11-07

Fix Fixed Recursor (PowerDNS): 5.3.3, 5.2.7, 5.1.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
PowerDNS	Recursor	5.3.0 to before 5.3.3; 5.2.0 to before 5.2.7; 5.1.0 to before 5.1.9	5.3.3, 5.2.7, 5.1.9	Patch available	CNA

Recursor VendorPowerDNS Affected 5.3.0 to before 5.3.3; 5.2.0 to before 5.2.7; 5.1.0 to before 5.1.9 Fixed in 5.3.3, 5.2.7, 5.1.9 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:powerdns:recursor::::::::	5.1.0 to before 5.1.9; 5.2.0 to before 5.2.7; 5.3.0 to before 5.3.3	Vulnerable	PowerDNS

cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* Versions 5.1.0 to before 5.1.9; 5.2.0 to before 5.2.7; 5.3.0 to before 5.3.3 Vulnerable ·PowerDNS

Remediation

Fix · CNA Recursor (PowerDNS) Fixed in 5.3.3, 5.2.7, 5.1.9

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2025-59030
2026-10-03 Alias added: GHSA-646x-553g-6v9h

References

Advisory 1

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-08.html

TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
TI-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
TI-2015-01678 The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and… CVSS 2.0HIGH 7.8
TI-2018-12065 Out-of-bounds read in [UNKNOWN] pdns-recursor CVSS 3.0HIGH 7.5
TI-2017-11091 NULL pointer dereference in PowerDNS pdns-recursor CVSS 3.0HIGH 7.5
TI-2014-07065 PowerDNS Recursor before 3.6.2 does not limit delegation chaining, which allows remote… CVSS 2.0MEDIUM 5.0

See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences