{
  "fix": "RLSA-2026:73971",
  "url": "https://patchblox.com/security/fix/linux/rlsa-2026-73971",
  "summary": "RLSA-2026:73971, released October 1, 2026, fixes 44 CVEs in thunderbird (version 0:140.16.0-1.el8_10). None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "linux",
  "type": "advisory",
  "title": "thunderbird security update",
  "released": "2026-10-01T18:01:23Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-92240, rated Critical",
  "supported": true,
  "cveCount": 44,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00628,
  "maxCvss": 10,
  "vendorAdvisory": "https://errata.rockylinux.org/RLSA-2026:73971",
  "appliesTo": [
    {
      "product": "thunderbird",
      "productUrl": "https://patchblox.com/security/product/linux/thunderbird",
      "release": "rocky 8",
      "fixedVersion": "0:140.16.0-1.el8_10",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-92240",
      "url": "https://patchblox.com/security/cve/CVE-2026-92240",
      "title": "Out-of-bounds read in IMAP response parser",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.1,
      "epss": 0.00628,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92238",
      "url": "https://patchblox.com/security/cve/CVE-2026-92238",
      "title": "Ambiguous parsing of mail headers",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00539,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-75874",
      "url": "https://patchblox.com/security/cve/CVE-2026-75874",
      "title": "Sandbox escape in the Remote Settings Client component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 10,
      "epss": 0.00455,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84143",
      "url": "https://patchblox.com/security/cve/CVE-2026-84143",
      "title": "Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00378,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92018",
      "url": "https://patchblox.com/security/cve/CVE-2026-92018",
      "title": "Sandbox escape in the DOM: Core \u0026 HTML component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00328,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84639",
      "url": "https://patchblox.com/security/cve/CVE-2026-84639",
      "title": "Uninitialized memory in MIME parsing",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.1,
      "epss": 0.00323,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92032",
      "url": "https://patchblox.com/security/cve/CVE-2026-92032",
      "title": "Sandbox escape due to invalid pointer in the Graphics component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00321,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84119",
      "url": "https://patchblox.com/security/cve/CVE-2026-84119",
      "title": "Sandbox escape due to use-after-free in the DOM: Navigation component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84121",
      "url": "https://patchblox.com/security/cve/CVE-2026-84121",
      "title": "Sandbox escape due to use-after-free in the DOM: Security component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92239",
      "url": "https://patchblox.com/security/cve/CVE-2026-92239",
      "title": "Buffer overrun in IMAP",
      "priority": "High",
      "severity": "high",
      "cvss": 8.1,
      "epss": 0.00406,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84145",
      "url": "https://patchblox.com/security/cve/CVE-2026-84145",
      "title": "Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.0037,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92005",
      "url": "https://patchblox.com/security/cve/CVE-2026-92005",
      "title": "Use-after-free in the Audio/Video: Web Codecs component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00357,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84131",
      "url": "https://patchblox.com/security/cve/CVE-2026-84131",
      "title": "Privilege escalation due to invalid pointer in the Graphics component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00328,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92006",
      "url": "https://patchblox.com/security/cve/CVE-2026-92006",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00328,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92022",
      "url": "https://patchblox.com/security/cve/CVE-2026-92022",
      "title": "Use-after-free in the DOM: HTML Parser component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92023",
      "url": "https://patchblox.com/security/cve/CVE-2026-92023",
      "title": "Use-after-free in the XML component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92024",
      "url": "https://patchblox.com/security/cve/CVE-2026-92024",
      "title": "Use-after-free in the SVG component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92025",
      "url": "https://patchblox.com/security/cve/CVE-2026-92025",
      "title": "Use-after-free in the DOM: Navigation component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92027",
      "url": "https://patchblox.com/security/cve/CVE-2026-92027",
      "title": "Use-after-free in the DOM: Streams component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92028",
      "url": "https://patchblox.com/security/cve/CVE-2026-92028",
      "title": "Use-after-free in the DOM: Core \u0026 HTML component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92029",
      "url": "https://patchblox.com/security/cve/CVE-2026-92029",
      "title": "Use-after-free in the SVG component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92016",
      "url": "https://patchblox.com/security/cve/CVE-2026-92016",
      "title": "Use-after-free in the Disability Access APIs component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00312,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92026",
      "url": "https://patchblox.com/security/cve/CVE-2026-92026",
      "title": "Use-after-free in the Networking component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00312,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92019",
      "url": "https://patchblox.com/security/cve/CVE-2026-92019",
      "title": "Mitigation bypass in the Remote Settings Client component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.1,
      "epss": 0.00307,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92031",
      "url": "https://patchblox.com/security/cve/CVE-2026-92031",
      "title": "Information disclosure in the Graphics: ImageLib component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00306,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92021",
      "url": "https://patchblox.com/security/cve/CVE-2026-92021",
      "title": "Use-after-free in the JavaScript Engine: JIT component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00282,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16365",
      "url": "https://patchblox.com/security/cve/CVE-2026-16365",
      "title": "Privilege escalation in the DOM: Workers component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00278,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84641",
      "url": "https://patchblox.com/security/cve/CVE-2026-84641",
      "title": "Information disclosure due to malicious IMAP server response",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.00267,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84640",
      "url": "https://patchblox.com/security/cve/CVE-2026-84640",
      "title": "One byte overflow read in mail parser",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.00263,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92015",
      "url": "https://patchblox.com/security/cve/CVE-2026-92015",
      "title": "Privilege escalation in the WebExtensions component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.0026,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92007",
      "url": "https://patchblox.com/security/cve/CVE-2026-92007",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92008",
      "url": "https://patchblox.com/security/cve/CVE-2026-92008",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92009",
      "url": "https://patchblox.com/security/cve/CVE-2026-92009",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92010",
      "url": "https://patchblox.com/security/cve/CVE-2026-92010",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92011",
      "url": "https://patchblox.com/security/cve/CVE-2026-92011",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92012",
      "url": "https://patchblox.com/security/cve/CVE-2026-92012",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92013",
      "url": "https://patchblox.com/security/cve/CVE-2026-92013",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92020",
      "url": "https://patchblox.com/security/cve/CVE-2026-92020",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00259,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92014",
      "url": "https://patchblox.com/security/cve/CVE-2026-92014",
      "title": "Privilege escalation due to incorrect boundary conditions in the Graphics component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00239,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92017",
      "url": "https://patchblox.com/security/cve/CVE-2026-92017",
      "title": "Privilege escalation in the DOM: Service Workers component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00239,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84120",
      "url": "https://patchblox.com/security/cve/CVE-2026-84120",
      "title": "Use-after-free in the Audio/Video component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00219,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-92030",
      "url": "https://patchblox.com/security/cve/CVE-2026-92030",
      "title": "Mitigation bypass in the DOM: Copy \u0026 Paste and Drag \u0026 Drop component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00218,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84122",
      "url": "https://patchblox.com/security/cve/CVE-2026-84122",
      "title": "Use-after-free in the Audio/Video component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00214,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84124",
      "url": "https://patchblox.com/security/cve/CVE-2026-84124",
      "title": "Use-after-free in the DOM: Core \u0026 HTML component",
      "priority": "High",
      "severity": "medium",
      "cvss": 8.8,
      "epss": 0.0017,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}