This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-50045 →

DEBIAN-CVE-2026-50045

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound...

Original description

The description as published by the source.

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 unbound

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

Debian:13 unbound

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.1-0+deb13u1"}]}]

Debian:14 unbound

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25.2-1"}]}]

References

advisory security-tracker.debian.org