CVE-2026-33602 — MEDIUM (6.5)

Q: What is CVE-2026-33602?

CVE-2026-33602 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.

Q: How severe is CVE-2026-33602?

CVE-2026-33602 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-33602?

Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Dnsdist.

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

HIGH

Affected Products

Vendor	Product	Versions
Powerdns	Dnsdist	>= 1.9.0, < 1.9.13

Related Weaknesses (CWE)

CWE-122

References

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-0Vendor Advisory

FAQ

What is CVE-2026-33602?

CVE-2026-33602 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.

How severe is CVE-2026-33602?

CVE-2026-33602 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33602?

Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Dnsdist.