Summaryinfo

A vulnerability labeled as problematic has been found in PowerDNS DNSdist up to 1.9.11/2.0.2. This affects an unknown part of the component HTTP3 Handler. The manipulation results in denial of service. This vulnerability was named CVE-2026-24030. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in PowerDNS DNSdist up to 1.9.11/2.0.2. Affected is an unknown part of the component HTTP3 Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was presented by XavLimSG. The advisory is available at dnsdist.org. This vulnerability is traded as CVE-2026-24030 since 01/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.9.12 or 2.0.3 eliminates this vulnerability.

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Productinfo

Type

• Domain Name Software

Vendor

• PowerDNS

Name

• DNSdist

Version

• 1.9.0
• 1.9.1
• 1.9.2
• 1.9.3
• 1.9.4
• 1.9.5
• 1.9.6
• 1.9.7
• 1.9.8
• 1.9.9
• 1.9.10
• 1.9.11
• 2.0.0
• 2.0.1
• 2.0.2

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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