CVE-2026-33261

Null pointer accces in aggressive NSEC(3) cache

State: Published
Severity: 5.9 Medium
Published: Apr 22, 2026
Updated: Apr 22, 2026
Reserved: Mar 18, 2026

Description

A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	OX

Weaknesses

CWE-353 Missing Support for Integrity Check

Affected Products

Product	Versions
RecursorPowerDNS	5.4.0 to before 5.4.1Affected 5.3.0 to before 5.3.6Affected 5.2.0 to before 5.2.9Affected

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html

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