Insufficient validation of zonemd record (CVE-2026-33601)

Summary

Insufficient validation of zonemd record

Original description

The description as published by the source.

If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2026-33601 pdns-recursor
Ubuntu UBUNTU-CVE-2026-33601 pdns-recursor

References

advisory docs.powerdns.com
advisory github.com
advisory nvd.nist.gov
package github.com
web repo.powerdns.com