| Name | CVE-2026-33602 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| dnsdist (PTS) | bullseye | 1.5.1-3 | vulnerable |
| bookworm | 1.7.3-2 | vulnerable |
| trixie | 1.9.10-1+deb13u1 | vulnerable |
| forky | 2.0.3-1 | vulnerable |
| sid | 2.0.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| dnsdist | source | bullseye | (unfixed) | end-of-life | | |
| dnsdist | source | bookworm | (unfixed) | end-of-life | | |
| dnsdist | source | (unstable) | 2.0.4-1 | | | |
Notes
[bookworm] - dnsdist <end-of-life> (See #1119290)
[bullseye] - dnsdist <end-of-life> (see #1119290)
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html#cve-2026-33602-off-by-one-access-when-processing-crafted-udp-responses