{
  "cveId": "CVE-2019-6250",
  "url": "https://patchblox.com/security/cve/CVE-2019-6250",
  "summary": "CVE-2019-6250 is fixed in libzmq5 on 1 platform by libzmq5 4.2.5-1ubuntu0.1 (version 4.2.5-1ubuntu0.1), released January 13, 2019. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libzmq5: A pointer overflow, with code execution, was discovered in ZeroMQ libzmq (aka 0MQ) 4.2.x and 4.3.x before 4.3.1",
  "description": "A pointer overflow, with code execution, was discovered in ZeroMQ libzmq (aka 0MQ) 4.2.x and 4.3.x before 4.3.1. A v2_decoder.cpp zmq::v2_decoder_t::size_ready integer overflow allows an authenticated attacker to overwrite an arbitrary amount of bytes beyond the bounds of a buffer, which can be leveraged to run arbitrary code on the target system. The memory layout allows the attacker to inject OS commands into a data structure located immediately after the problematic buffer (i.e., it is not necessary to use a typical buffer-overflow exploitation technique that changes the flow of control).",
  "published": "2019-01-13T07:29:00Z",
  "severity": "Medium",
  "epss": 0.09701,
  "epssPercentile": 0.95541,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libzmq5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.2.5-1ubuntu0.1",
      "fix": "libzmq5 4.2.5-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libzmq5-4.2.5-1ubuntu0.1",
      "released": "2019-01-13T07:29:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}