This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-40011 →

DEBIAN-CVE-2026-40011

An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output...

Original description

The description as published by the source.

An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 dnsdist

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 dnsdist

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.15-0+deb13u1"}]}]

Debian:14 dnsdist

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-1"}]}]

References

advisory security-tracker.debian.org