CVE-2021-20234

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    CVE-2021-20234

    Published: 1 Apr 2021Last Modified: 9 Jul 2026

    Summary:

    Details: 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.

    References: https://bugzilla.redhat.com/show_bug.cgi?id=1921972, https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -04f5bbedee58c538934374dc45182d8fc5926fa3

    Affected versions

    v4.3.2
    v4.3.1
    v4.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-20234 | CVE-DB