{
  "cveId": "CVE-2020-12396",
  "url": "https://patchblox.com/security/cve/CVE-2020-12396",
  "summary": "CVE-2020-12396 is fixed in 4 products on 2 platforms, first by firefox 76.0\u002Bbuild2-0ubuntu0.18.04.1, released May 6, 2020. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Firefox ESR: Mozilla developers and community members reported memory safety bugs present in Firefox 75.",
  "description": "Mozilla developers and community members reported memory safety bugs present in Firefox 75. 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 76.",
  "published": "2020-05-06T17:00:00Z",
  "severity": "Medium",
  "cvss": 9.8,
  "epss": 0.01676,
  "epssPercentile": 0.77011,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2020-12396",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (en-US)",
      "fixedVersion": "78.0esr",
      "fix": "Mozilla Firefox ESR (en-US) 78.0esr",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr-78.0esr",
      "released": "2020-06-25T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "76.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "firefox 76.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-76.0-build2-0ubuntu0.18.04.1",
      "released": "2020-05-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "76.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "firefox 76.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-76.0-build2-0ubuntu0.20.04.1",
      "released": "2020-05-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "76.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "firefox-geckodriver 76.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-geckodriver-76.0-build2-0ubuntu0.18.04.1",
      "released": "2020-05-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "76.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "firefox-geckodriver 76.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-geckodriver-76.0-build2-0ubuntu0.20.04.1",
      "released": "2020-05-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "76.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "firefox-mozsymbols 76.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-mozsymbols-76.0-build2-0ubuntu0.18.04.1",
      "released": "2020-05-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "76.0\u002Bbuild2-0ubuntu0.20.04.1",
      "fix": "firefox-mozsymbols 76.0\u002Bbuild2-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-mozsymbols-76.0-build2-0ubuntu0.20.04.1",
      "released": "2020-05-06T17:00:00Z"
    }
  ],
  "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"
  }
}