{
  "cveId": "CVE-2021-3571",
  "url": "https://patchblox.com/security/cve/CVE-2021-3571",
  "summary": "CVE-2021-3571 is fixed in linuxptp on 1 platform, first by RHSA-2021:4321, released November 9, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linuxptp: The linuxptp packages provide Precision Time Protocol (PTP) implementation for Linux according to IEEE standard 1588...",
  "description": "The linuxptp packages provide Precision Time Protocol (PTP) implementation for Linux according to IEEE standard 1588 for Linux. The dual design goals are to provide a robust implementation of the standard and to use the most relevant and modern Application Programming Interfaces (API) offered by the Linux kernel. \n\nThe following packages have been upgraded to a later upstream version: linuxptp (3.1.1). (BZ#1895005)\n\nSecurity Fix(es):\n\n* linuxptp: wrong length of one-step follow-up in transparent clock (CVE-2021-3571)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.",
  "published": "2021-11-09T00:00:00Z",
  "severity": "Moderate",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
  "epss": 0.01895,
  "epssPercentile": 0.79744,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linuxptp",
      "release": "RHEL 8",
      "fixedVersion": "0:3.1.1-1.el8",
      "fix": "RHSA-2021:4321",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4321",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linuxptp",
      "release": "almalinux 8",
      "fixedVersion": "3.1.1-1.el8",
      "fix": "ALSA-2021:4321",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4321",
      "released": "2021-11-09T09:00:47Z"
    },
    {
      "platform": "linux",
      "product": "linuxptp",
      "release": "ol 8",
      "fixedVersion": "0:3.1.1-1.el8",
      "fix": "ELSA-2021-4321",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4321",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linuxptp",
      "release": "rocky 8",
      "fixedVersion": "0:3.1.1-1.el8",
      "fix": "RLSA-2021:4321",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2021-4321",
      "released": "2021-11-09T09:00:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}