CVE catalog
CVE-2026-33601
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
- Severity
- Medium · CVSS 4.9
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.51% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | pdns-recursor | sid | 5.4.9-1 | fixed |
| Debian | pdns-recursor | forky | 5.4.8-1 | fixed |
| Debian | pdns-recursor | trixie | 5.2.13-0+deb13u1 | fixed |
| Debian | pdns-recursor | trixie-security | 5.2.13-0+deb13u1 | fixed |
| Debian | pdns-recursor | bookworm | 4.8.8-1+deb12u1 | vulnerable |
| Debian | pdns-recursor | bookworm-security | 4.8.8-1+deb12u1 | vulnerable |
| Cpe | pdns-recursor | Not reported | Not reported | vulnerable |
| Cpe | recursor | Not reported | 5.2.9 | fixed |
| Cpe | recursor | Not reported | 5.3.6 | fixed |
| Cpe | recursor | Not reported | Not reported | unknown |
| Cpe | recursor | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pdns-recursor | source | sid | 5.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | pdns-recursor | source | forky | 5.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | pdns-recursor | source | trixie | 5.2.9-0+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | pdns-recursor | source | bookworm | (unfixed) | end-of-life | Not reported | Not reported |
| Cpe | recursor | cpe | Not reported | 5.2.9 | Not reported | Not reported | Not reported |
| Cpe | recursor | cpe | Not reported | 5.3.6 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [pdns-recursor]Affected
Details (4)
4.8.8-1+deb12u1· amd64 · bookwormAffected
nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12
4.8.8-1+deb12u1· arm64 · bookwormAffected
nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12
4.8.8-1+deb12u1· amd64 · bookworm-securityAffected
nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12
4.8.8-1+deb12u1· arm64 · bookworm-securityAffected
nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12
[Debian 13 (Trixie)]
- [pdns-recursor]Fixed
Details (4)
5.2.11-0+deb13u1· amd64 · trixieFixed · Fixed:
5.2.9-0+deb13u1nvd · pdns-recursor · debian · 13
5.2.11-0+deb13u1· arm64 · trixieFixed · Fixed:
5.2.9-0+deb13u1nvd · pdns-recursor · debian · 13
5.2.13-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
5.2.9-0+deb13u1nvd · pdns-recursor · debian · 13
5.2.13-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
5.2.9-0+deb13u1nvd · pdns-recursor · debian · 13
Observed:
References
- [https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-33601]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-33601]
- [https://security-tracker.debian.org/tracker/CVE-2026-33601]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33601.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1225.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]