CVE-2026-33602

Published: Apr 22, 2026Modified: Jun 17, 2026

8.2

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Exploitability: 3.9 / Impact: 4.2

Source: NVD

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.

Affected (2)

Products: Powerdns: Dnsdist

Powerdns

1 product

Dnsdist

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Powerdns Dnsdist	From 1.9.0 to 1.9.13
Powerdns Dnsdist	From 2.0.0 to 2.0.4

Related CWEs

CWE-122

Heap-based Buffer Overflow

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().

References (1)

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html

Source: security@open-xchange.com

Vendor Advisory

Timeline

No history available yet.