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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade pdns-recursor | Apr 29, 2026 | Apr 22, 2026 |
| Debian | — | Upgrade pdns-recursor | Jul 23, 2026 | Jul 23, 2026 |
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