{
  "fix": "RHSA-2021:3155",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2021-3155",
  "summary": "RHSA-2021:3155, released August 16, 2021, fixes 6 CVEs in thunderbird (version 0:78.13.0-1.el8_4). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "thunderbird security update",
  "released": "2021-08-16T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2021-29985, high severity",
  "supported": true,
  "cveCount": 6,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01451,
  "maxCvss": 8.8,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2021:3155",
  "appliesTo": [
    {
      "product": "thunderbird",
      "productUrl": "https://patchblox.com/security/product/linux/thunderbird",
      "release": "RHEL 8",
      "fixedVersion": "0:78.13.0-1.el8_4",
      "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: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nThis...",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.01263,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}