CVE-2026-33602
Off-by-one access when processing crafted UDP responses
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.
| Vendor | powerdns |
| Product | dnsdist |
| Published | Apr 22, 2026 |
| Last Updated | Apr 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
PowerDNS / DNSdist
1.9.0 < 1.9.13 2.0.0 < 2.0.4
References
Credits
ylwango613