Allocation of Resources Without Limits or Throttling Affecting python3-zeroconf package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-RHEL8-PYTHON3ZEROCONF-18603230
  • published10 Aug 2026
  • disclosed17 Jul 2026

Introduced: 17 Jul 2026

CVE-2026-48045  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 python3-zeroconf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-zeroconf package and not the python3-zeroconf package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.12, AsyncListener.handle_query_or_defer retained every truncated TC-bit incoming query, each up to _MAX_MSG_ABSOLUTE = 8966 bytes, in self._deferred[addr] and armed a per-address timer in self._timers[addr] without capping the per-address list or distinct addr keys, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to spoof sources, grow _deferred and _timers, and cause memory exhaustion and quadratic CPU burn. This issue is fixed in version 0.149.12.

CVSS Base Scores

version 3.1