CVE-2026-24030

MEDIUM

Unbounded memory allocation for DoQ and DoH3

Title source: cna
STIX 2.1

Description

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.

Scores

CVSS v3 5.3
EPSS 0.0001
EPSS Percentile 1.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-789
Status published
Products (3)
PowerDNS/DNSdist 1.9.0 - 1.9.12
powerdns/dnsdist 1.9.0 - 1.9.12
PowerDNS/DNSdist 2.0.0 - 2.0.3
Published Mar 31, 2026
Tracked Since Mar 31, 2026