CVE-2026-27853
Fixed in a distro release EPSS <1%CVSS 5.9
An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. In some cases the rewritten packet might become larger than the initial response and even exceed 65535 bytes, potentially leading to a crash resulting in denial of service.
Products: powerdns dnsdist
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | dnsdist | no fix |
| Debian 13 | dnsdist | 1.9.14-0+deb13u1 |
| Debian 14 | dnsdist | 2.0.3-1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | dnsdist | 1.9.12-150700.3.9.1 |
| SUSE Linux Enterprise Server 16.0 | dnsdist | 1.9.13-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | dnsdist | 1.9.13-160000.1.1 |
| 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 | 1.9.13-160000.1.1 |