CVE-2026-42004
Fixed in a distro release EPSS <1%CVSS 3.7
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
Products: powerdns dnsdist
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | dnsdist | no fix |
| Debian 13 | dnsdist | 1.9.15-0+deb13u1 |
| Debian 14 | dnsdist | 2.1.0-1 |
| SUSE Linux Enterprise Server 16.0 | dnsdist | 1.9.15-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | dnsdist | 1.9.15-160000.1.1 |
| Ubuntu 16.04 LTS | dnsdist | no fix |
| Ubuntu 25.10 | dnsdist | no fix |
| Ubuntu 26.04 LTS | dnsdist | no fix |
| Ubuntu 26.10 | dnsdist | no fix |
| Ubuntu Pro 18.04 LTS | dnsdist | no fix |
| Ubuntu Pro 20.04 LTS | dnsdist | no fix |
| Ubuntu Pro 22.04 LTS | dnsdist | no fix |
| Ubuntu Pro 24.04 LTS | dnsdist | no fix |
| openSUSE Leap 16.0 | dnsdist | 1.9.15-160000.1.1 |
| openSUSE Tumbleweed | dnsdist | 2.0.7-1.1 |