CVE-2026-33596: Integer Overflow or Wraparound in PowerDNS DNSdist
A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound condition in PowerDNS DNSdist that may lead to query-response mismatches under specific conditions. An attacker might trigger this by flooding the DNSdist server with carefully timed queries targeting TCP-only or DNS over TLS backends. The issue affects versions 1.9.0 and 2.0.0 of DNSdist. The CVSS 3.1 base score is 3.1, reflecting low impact with no confidentiality, integrity, or significant availability impact. No official remediation or patch has been documented in the vendor advisory or CVE data.
Potential Impact
The impact is limited to a potential mismatch between queries and responses, which could cause minor disruptions or degraded service reliability. There is no reported confidentiality or integrity impact, and the availability impact is low. No known exploitation in the wild has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary workaround is documented, users should monitor vendor communications for updates. No immediate mitigation actions are specified by the vendor.
CVE-2026-33596: Integer Overflow or Wraparound in PowerDNS DNSdist
Description
A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound condition in PowerDNS DNSdist that may lead to query-response mismatches under specific conditions. An attacker might trigger this by flooding the DNSdist server with carefully timed queries targeting TCP-only or DNS over TLS backends. The issue affects versions 1.9.0 and 2.0.0 of DNSdist. The CVSS 3.1 base score is 3.1, reflecting low impact with no confidentiality, integrity, or significant availability impact. No official remediation or patch has been documented in the vendor advisory or CVE data.
Potential Impact
The impact is limited to a potential mismatch between queries and responses, which could cause minor disruptions or degraded service reliability. There is no reported confidentiality or integrity impact, and the availability impact is low. No known exploitation in the wild has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary workaround is documented, users should monitor vendor communications for updates. No immediate mitigation actions are specified by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-03-23T12:57:56.814Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e8d83319fe3cd2cdbdac10
Added to database: 4/22/2026, 2:16:19 PM
Last enriched: 4/22/2026, 2:32:15 PM
Last updated: 4/23/2026, 1:09:35 AM
Views: 9
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