| Name | CVE-2026-33259 |
| Description | Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pdns-recursor (PTS) | bullseye | 4.4.2-3 | vulnerable |
| bookworm, bookworm (security) | 4.8.8-1+deb12u1 | vulnerable |
| trixie (security), trixie | 5.2.8-0+deb13u1 | vulnerable |
| forky | 5.4.0-1 | vulnerable |
| sid | 5.4.1-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - pdns-recursor <end-of-life> (see DSA 6045)
[bullseye] - pdns-recursor <end-of-life> (see DSA 6045)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-03.html#cve-2026-33259-concurrent-modification-of-rpz-data-can-lead-to-denial-of-service