pdns-recursor: An issue has been found in PowerDNS Recursor before version 4.1.8 where aremote attacker sending a DNS query can trig...
CVE-2018-16855 is fixed in pdns-recursor on 1 platform, first by pdns-recursor 4.1.8-1, released January 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
An issue has been found in PowerDNS Recursor before version 4.1.8 where aremote attacker sending a DNS query can trigger an out-of-bounds memoryread while computing the hash of the query for a packet cache lookup,possibly leading to a crash.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pdns-recursor · Ubuntu 24.10 (oracular) | 4.1.8-1 | pdns-recursor 4.1.8-1 | Jan 16, 2026 |
| pdns-recursor · Ubuntu 25.04 (plucky) | 4.1.8-1 | pdns-recursor 4.1.8-1 | Jan 16, 2026 |
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