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

CVE-2026-33602

Off-by-one access when processing crafted UDP responses PUBLISHED

Description (CNA)

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.

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.