{
  "cveId": "CVE-2021-40516",
  "url": "https://patchblox.com/security/cve/CVE-2021-40516",
  "summary": "CVE-2021-40516 is fixed in 12 products on 1 platform, first by weechat 1.9.1-1ubuntu1\u002Besm1, released September 5, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "weechat: WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that...",
  "description": "WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.",
  "published": "2021-09-05T11:15:00Z",
  "severity": "Medium",
  "epss": 0.01594,
  "epssPercentile": 0.75862,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "weechat",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.9.1-1ubuntu1\u002Besm1",
      "fix": "weechat 1.9.1-1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-weechat-1.9.1-1ubuntu1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-core",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.9.1-1ubuntu1\u002Besm1",
      "fix": "weechat-core 1.9.1-1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-weechat-core-1.9.1-1ubuntu1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-core",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-core 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-core-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-curses",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.9.1-1ubuntu1\u002Besm1",
      "fix": "weechat-curses 1.9.1-1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-weechat-curses-1.9.1-1ubuntu1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-curses",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-curses 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-curses-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-guile",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-guile 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-guile-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-headless",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-headless 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-headless-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-lua",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-lua 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-lua-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-perl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-perl 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-perl-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-php",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-php 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-php-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-plugins",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.9.1-1ubuntu1\u002Besm1",
      "fix": "weechat-plugins 1.9.1-1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-weechat-plugins-1.9.1-1ubuntu1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-plugins",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-plugins 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-plugins-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-python",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-python 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-python-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-ruby",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-ruby 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-ruby-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "weechat-tcl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.8-1ubuntu0.1~esm1",
      "fix": "weechat-tcl 2.8-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-weechat-tcl-2.8-1ubuntu0.1-esm1",
      "released": "2021-09-05T11:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}