CVE-2026-33602
Received
Received - Intake
Out-of-Bounds Write in UDP Handling Causes Denial of Service
Publication date: 2026-04-22
Last updated on: 2026-04-24
Assigner: Open-Xchange
Description
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| powerdns | dnsdist | From 1.9.0 (inc) to 1.9.13 (exc) |
| powerdns | dnsdist | From 2.0.0 (inc) to 2.0.4 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-122 | A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs when a rogue backend sends a specially crafted UDP response with a query ID that is off by one from the maximum configured value. This causes an out-of-bounds write in the system.
The out-of-bounds write can lead to a denial of service condition.
How can this vulnerability impact me? :
The primary impact of this vulnerability is a denial of service (DoS) attack.
An attacker exploiting this vulnerability can cause the affected system to crash or become unavailable by triggering an out-of-bounds write.
Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70