CVE-2025-30195Network attack vector

Resolver crash via crafted cached Resource Record Sets

Published Apr 7, 2025 · Updated Apr 7, 2025

NULL pointer dereference in PowerDNS Recursor 5.2.0 allows remote attackers controlling a DNS zone to crash the resolver. Processing and caching specific Resource Record Sets from the crafted zone causes an illegal memory access; PowerDNS has not disclosed the precise cache locus or invalid dereference. The attacker must publish the zone and induce resolution through it; the documented consequence is a process crash without system compromise.

CVSS severity7.5
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in PowerDNS Recursor 5.2.0 allows remote attackers controlling a DNS zone to crash the resolver. Processing and caching specific Resource Record Sets from the crafted zone causes an illegal memory access; PowerDNS has not disclosed the precise cache locus or invalid dereference. The attacker must publish the zone and induce resolution through it; the documented consequence is a process crash without system compromise.

The record

CVE
CVE-2025-30195
Published
Apr 7, 2025
Updated
Apr 7, 2025
Vendor
PowerDNS
Product
PowerDNS Recursor
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PowerDNS · PowerDNS Recursorversion=5.2.0

Published CVSS scores

7.5Open-XchangeCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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