{
  "cveId": "CVE-2021-38499",
  "url": "https://patchblox.com/security/cve/CVE-2021-38499",
  "summary": "CVE-2021-38499 is fixed in 4 products on 2 platforms, first by firefox 93.0\u002Bbuild1-0ubuntu0.18.04.1, released November 2, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Mozilla Firefox ESR and 1 other: Mozilla developers reported memory safety bugs present in Firefox 92.",
  "description": "Mozilla developers reported memory safety bugs present in Firefox 92. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox \u003C 93.",
  "published": "2021-11-02T18:15:00Z",
  "severity": "Medium",
  "cvss": 8.8,
  "epss": 0.00824,
  "epssPercentile": 0.576,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-38499",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (en-US)",
      "fixedVersion": "102.0",
      "fix": "Mozilla Firefox ESR (en-US) 102.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr-102.0",
      "released": "2022-06-23T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "93.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "firefox 93.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-93.0-build1-0ubuntu0.18.04.1",
      "released": "2021-11-02T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "93.0\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "firefox 93.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-93.0-build1-0ubuntu0.20.04.1",
      "released": "2021-11-02T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "93.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "firefox-geckodriver 93.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-geckodriver-93.0-build1-0ubuntu0.18.04.1",
      "released": "2021-11-02T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "93.0\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "firefox-geckodriver 93.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-geckodriver-93.0-build1-0ubuntu0.20.04.1",
      "released": "2021-11-02T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "93.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "firefox-mozsymbols 93.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-mozsymbols-93.0-build1-0ubuntu0.18.04.1",
      "released": "2021-11-02T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "93.0\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "firefox-mozsymbols 93.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-mozsymbols-93.0-build1-0ubuntu0.20.04.1",
      "released": "2021-11-02T18:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}