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CVE Vulnerability Details :
CVE-2026-33259
PUBLISHED
More InfoOfficial Page
Assigner-OX
Assigner Org ID-8ce71d90-2354-404b-a86e-bec2cc4e6981
View Known Exploited Vulnerability (KEV) details
Published At-22 Apr, 2026 | 09:38
Updated At-22 Apr, 2026 | 18:10
Rejected At-
▼CVE Numbering Authority (CNA)
Concurrent modification of RPZ data can lead to denial of servce

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.

Affected Products
Vendor
PowerDNS
Product
Recursor
Collection URL
https://repo.powerdns.com/
Package Name
pdns-recursor
Repo
https://github.com/PowerDNS/pdns
Modules
  • RPZ
Program Files
  • filterpo.hh
Default Status
unaffected
Versions
Affected
  • From 5.4.0 before 5.4.1 (semver)
  • From 5.3.0 before 5.3.6 (semver)
  • From 5.2.0 before 5.2.9 (semver)
Problem Types
TypeCWE IDDescription
CWEUseUse After Free
Type: CWE
CWE ID: Use
Description: Use After Free
Metrics
VersionBase scoreBase severityVector
3.15.0MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Haruto Kimura (Stella)
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html
N/A
Hyperlink: https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-416CWE-416 Use After Free
Type: CWE
CWE ID: CWE-416
Description: CWE-416 Use After Free
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found