{
  "fix": "firefox 91.0\u002Bbuild2-0ubuntu0.18.04.1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-91.0-build2-0ubuntu0.18.04.1",
  "summary": "firefox 91.0\u002Bbuild2-0ubuntu0.18.04.1, released August 10, 2021, fixes 10 CVEs in firefox. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "firefox 91.0\u002Bbuild2-0ubuntu0.18.04.1 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2021-08-10T17:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2021-29985, high severity",
  "supported": false,
  "cveCount": 10,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01451,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "firefox",
      "productUrl": "https://patchblox.com/security/product/linux/firefox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "91.0\u002Bbuild2-0ubuntu0.18.04.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-29985",
      "url": "https://patchblox.com/security/cve/CVE-2021-29985",
      "title": "Firefox ESR and 3 others: A use-after-free vulnerability in media channels could have led to memory corruption and a potentially\u2026",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.01451,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29980",
      "url": "https://patchblox.com/security/cve/CVE-2021-29980",
      "title": "Firefox ESR and 3 others: Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption\u2026",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.01399,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29984",
      "url": "https://patchblox.com/security/cve/CVE-2021-29984",
      "title": "Firefox ESR and 3 others: Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly\u2026",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.01386,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29988",
      "url": "https://patchblox.com/security/cve/CVE-2021-29988",
      "title": "Firefox ESR and 3 others: Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds\u2026",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.0138,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29989",
      "url": "https://patchblox.com/security/cve/CVE-2021-29989",
      "title": "Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12.",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.01268,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29986",
      "url": "https://patchblox.com/security/cve/CVE-2021-29986",
      "title": "firefox: ELSA-2021-3157: firefox security update (IMPORTANT)",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.1,
      "epss": 0.01263,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29981",
      "url": "https://patchblox.com/security/cve/CVE-2021-29981",
      "title": "Firefox ESR and 3 others: An issue present in lowering/register allocation could have led to obscure but deterministic register\u2026",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.01012,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29990",
      "url": "https://patchblox.com/security/cve/CVE-2021-29990",
      "title": "Firefox ESR and 1 other: Mozilla developers and community members reported memory safety bugs present in Firefox 90.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.01009,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29982",
      "url": "https://patchblox.com/security/cve/CVE-2021-29982",
      "title": "Firefox ESR and 3 others: Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting\u2026",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.01124,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-29987",
      "url": "https://patchblox.com/security/cve/CVE-2021-29987",
      "title": "firefox: After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be d...",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00945,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-12T07:53:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}