Off-by-one access when processing crafted UDP responses (CVE-2026-33602)

Summary

Off-by-one access when processing crafted UDP responses

Original description

The description as published by the source.

A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.

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

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2026-33602 dnsdist
Ubuntu UBUNTU-CVE-2026-33602 dnsdist

References

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