{
  "cveId": "CVE-2021-38494",
  "url": "https://patchblox.com/security/cve/CVE-2021-38494",
  "summary": "CVE-2021-38494 is fixed in 4 products on 2 platforms, first by firefox 92.0\u002Bbuild3-0ubuntu0.18.04.1, released September 8, 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 91.",
  "description": "Mozilla developers reported memory safety bugs present in Firefox 91. 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 92.",
  "published": "2021-09-08T17:00:00Z",
  "severity": "Medium",
  "cvss": 8.8,
  "epss": 0.00806,
  "epssPercentile": 0.57031,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-38494",
  "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": "92.0\u002Bbuild3-0ubuntu0.18.04.1",
      "fix": "firefox 92.0\u002Bbuild3-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-92.0-build3-0ubuntu0.18.04.1",
      "released": "2021-09-08T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "92.0\u002Bbuild3-0ubuntu0.20.04.1",
      "fix": "firefox 92.0\u002Bbuild3-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-92.0-build3-0ubuntu0.20.04.1",
      "released": "2021-09-08T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "92.0\u002Bbuild3-0ubuntu0.18.04.1",
      "fix": "firefox-geckodriver 92.0\u002Bbuild3-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-geckodriver-92.0-build3-0ubuntu0.18.04.1",
      "released": "2021-09-08T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "92.0\u002Bbuild3-0ubuntu0.20.04.1",
      "fix": "firefox-geckodriver 92.0\u002Bbuild3-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-geckodriver-92.0-build3-0ubuntu0.20.04.1",
      "released": "2021-09-08T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "92.0\u002Bbuild3-0ubuntu0.18.04.1",
      "fix": "firefox-mozsymbols 92.0\u002Bbuild3-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-mozsymbols-92.0-build3-0ubuntu0.18.04.1",
      "released": "2021-09-08T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "92.0\u002Bbuild3-0ubuntu0.20.04.1",
      "fix": "firefox-mozsymbols 92.0\u002Bbuild3-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-mozsymbols-92.0-build3-0ubuntu0.20.04.1",
      "released": "2021-09-08T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}