CVE-2026-33595 — DoQ/DoH3 excessive memory allocation

CVE-2026-33595

DoQ/DoH3 excessive memory allocation PUBLISHED

Description (CNA)

A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.

Affected (CNA)

Vendor / product	Versions
PowerDNS / DNSdist	affected 1.9.0 before 1.9.13; affected 2.0.0 before 2.0.4

CWE

No CWE identifiers supplied.

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.