This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-47180 →
DEBIAN-CVE-2026-47180
Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.5, DNSIncoming._decode_labels_at_offset recurses once per...
Original description
The description as published by the source.
Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.5, DNSIncoming._decode_labels_at_offset recurses once per DNS-name compression pointer, and a single mDNS packet carrying chained pointers can trigger a RecursionError that escapes DNSIncoming.init, causing sustained CPU burn, log flooding, and degraded mDNS-dependent features for unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb). This issue is fixed in version 0.149.5.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
python-zeroconf
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
python-zeroconf
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
python-zeroconf
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.149.6-1"}]}]
References
- advisory security-tracker.debian.org