VULNERABILITY INTELLIGENCE

CVE-2021-20234

CVSS score6.5 MEDIUM

EPSS probability1.07%

CISA KEVNot currently listed

Published2021-04-01

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Description

An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.

Weakness classification

secalert@redhat.com: CWE-400
nvd@nist.gov: CWE-401

Primary references

secalert@redhat.com — Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com — Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Patch, Third Party Advisory