{
  "cveId": "CVE-2021-27135",
  "url": "https://patchblox.com/security/cve/CVE-2021-27135",
  "summary": "CVE-2021-27135 is fixed in 2 products on 1 platform, first by xterm 330-1ubuntu2.2, released February 10, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "xterm: The xterm program is a terminal emulator for the X Window System",
  "description": "The xterm program is a terminal emulator for the X Window System. It provides DEC VT102 and Tektronix 4014 compatible terminals for programs that can\u0027t use the window system directly.\n\nSecurity Fix(es):\n\n* xterm: crash when processing combining characters (CVE-2021-27135)\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.",
  "published": "2021-02-10T08:15:00Z",
  "severity": "Important",
  "cvss": 9.8,
  "epss": 0.07863,
  "epssPercentile": 0.94733,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "xterm",
      "release": "RHEL 8",
      "fixedVersion": "0:331-1.el8_3.2",
      "fix": "RHSA-2021:0611",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0611",
      "released": "2021-02-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xterm",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "330-1ubuntu2.2",
      "fix": "xterm 330-1ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xterm-330-1ubuntu2.2",
      "released": "2021-02-10T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xterm",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "353-1ubuntu1.20.04.2",
      "fix": "xterm 353-1ubuntu1.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xterm-353-1ubuntu1.20.04.2",
      "released": "2021-02-10T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xterm",
      "release": "ol 8",
      "fixedVersion": "0:331-1.el8_3.2",
      "fix": "ELSA-2021-0611",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0611",
      "released": "2021-02-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xterm-resize",
      "release": "RHEL 8",
      "fixedVersion": "0:331-1.el8_3.2",
      "fix": "RHSA-2021:0611",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0611",
      "released": "2021-02-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xterm-resize",
      "release": "ol 8",
      "fixedVersion": "0:331-1.el8_3.2",
      "fix": "ELSA-2021-0611",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0611",
      "released": "2021-02-18T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}