Outgoing DoH excessive memory allocation (CVE-2026-33594)

Summary

Outgoing DoH excessive memory allocation

Original description

The description as published by the source.

A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2026-33594 dnsdist
Ubuntu UBUNTU-CVE-2026-33594 dnsdist

References

advisory github.com
advisory nvd.nist.gov
advisory dnsdist.org
package github.com
web repo.powerdns.com