| Name | CVE-2026-73206 |
| Description | A crafted DNS packet can cause a denial of service decompressing the DNS names in the packet |
| 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) |
| References | DSA-6587-1 |
| Debian Bugs | 1152255, 1152924 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pdns (PTS) | bookworm | 4.7.3-2 | vulnerable |
| trixie | 4.9.17-0+deb13u1 | vulnerable |
| trixie (security) | 4.9.18-0+deb13u1 | fixed |
| forky, sid | 5.1.5-2 | fixed |
| pdns-recursor (PTS) | bookworm, bookworm (security) | 4.8.8-1+deb12u1 | vulnerable |
| trixie (security), trixie | 5.2.13-0+deb13u1 | vulnerable |
| forky, sid | 5.4.9-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - pdns <end-of-life> (See #1119290)
[bookworm] - pdns-recursor <end-of-life> (see DSA 6045)
https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-12.html#cve-2026-73206-crafted-packet-using-compression-pointers-can-lead-to-denial-of-service