CVE-2026-24030 MEDIUM

CVE-2026-24030: Unbounded memory allocation for DoQ and DoH3

Vendor Powerdns
Product DNSdist
Published March 31, 2026
Last update March 31, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
March 31, 2026 Record updated