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.
{
"sources": [
{
"imported": "2026-07-17T22:03:04.282Z",
"modified": "2026-06-17T03:33:31.277Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20234",
"published": "2021-04-01T14:15:13.123Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-20234",
"database_specific": {
"status": "Modified"
},
"id": "CVE-2021-20234"
}
],
"license": "CC-BY-4.0"
}