{
  "fix": "RHSA-2021:3838",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2021-3838",
  "summary": "RHSA-2021:3838, released October 13, 2021, fixes 7 CVEs in thunderbird (version 0:91.2.0-1.el8_4). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "thunderbird security update",
  "released": "2021-10-13T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2021-32810, high severity",
  "supported": true,
  "cveCount": 7,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01907,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2021:3838",
  "appliesTo": [
    {
      "product": "thunderbird",
      "productUrl": "https://patchblox.com/security/product/linux/thunderbird",
      "release": "RHEL 8",
      "fixedVersion": "0:91.2.0-1.el8_4",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-32810",
      "url": "https://patchblox.com/security/cve/CVE-2021-32810",
      "title": "firefox: crossbeam-deque is a package of work-stealing deques for building taskschedulers when programming in Rust",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.01907,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38496",
      "url": "https://patchblox.com/security/cve/CVE-2021-38496",
      "title": "Mozilla Firefox ESR and 3 others: During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting\u2026",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01659,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38498",
      "url": "https://patchblox.com/security/cve/CVE-2021-38498",
      "title": "Mozilla Firefox ESR and 3 others: During process shutdown, a document could have caused a use-after-free of a languages service object,\u2026",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.01467,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38500",
      "url": "https://patchblox.com/security/cve/CVE-2021-38500",
      "title": "Mozilla Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1.",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01273,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38502",
      "url": "https://patchblox.com/security/cve/CVE-2021-38502",
      "title": "Mozilla Thunderbird and 1 other: Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection.",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.01101,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38501",
      "url": "https://patchblox.com/security/cve/CVE-2021-38501",
      "title": "Mozilla Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1.",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01048,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-38497",
      "url": "https://patchblox.com/security/cve/CVE-2021-38497",
      "title": "Mozilla Firefox ESR and 3 others: Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid\u2026",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.5,
      "epss": 0.00591,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}