{
  "fix": "thunderbird 1:115.3.1\u002Bbuild1-0ubuntu0.22.04.2",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-thunderbird-1-115.3.1-build1-0ubuntu0.22.04.2",
  "summary": "thunderbird 1:115.3.1\u002Bbuild1-0ubuntu0.22.04.2, released September 28, 2023, fixes 11 CVEs in thunderbird. One of them is being exploited (CVE-2023-5217); 1 on CISA KEV. Patch Radar priority: Patch now.",
  "platform": "linux",
  "type": "package",
  "title": "thunderbird 1:115.3.1\u002Bbuild1-0ubuntu0.22.04.2 for Ubuntu 22.04.1 LTS (jammy)",
  "released": "2023-09-28T17:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2023-5217, exploited (CISA KEV)",
  "supported": true,
  "cveCount": 11,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.49013,
  "maxCvss": 9.8,
  "appliesTo": [
    {
      "product": "thunderbird",
      "productUrl": "https://patchblox.com/security/product/linux/thunderbird",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:115.3.1\u002Bbuild1-0ubuntu0.22.04.2",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2023-5217",
      "url": "https://patchblox.com/security/cve/CVE-2023-5217",
      "title": "Chromium: CVE-2023-5217 Heap buffer overflow in vp8 encoding in libvpx",
      "priority": "Patch now",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.49013,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": true
    },
    {
      "cveId": "CVE-2023-5176",
      "url": "https://patchblox.com/security/cve/CVE-2023-5176",
      "title": "Mozilla Firefox ESR and 5 others: Out-of-bounds Write",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.01388,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4057",
      "url": "https://patchblox.com/security/cve/CVE-2023-4057",
      "title": "Mozilla Firefox ESR and 5 others: Memory safety bugs present in Firefox 115, Firefox ESR 115.0, and Thunderbird 115.0.",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00888,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4585",
      "url": "https://patchblox.com/security/cve/CVE-2023-4585",
      "title": "Memory safety bugs fixed in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.00774,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4583",
      "url": "https://patchblox.com/security/cve/CVE-2023-4583",
      "title": "Browsing Context potentially not cleared when closing Private Window",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.00685,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4577",
      "url": "https://patchblox.com/security/cve/CVE-2023-4577",
      "title": "Memory corruption in JIT UpdateRegExpStatics",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.00652,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-3600",
      "url": "https://patchblox.com/security/cve/CVE-2023-3600",
      "title": "Use-after-free in workers",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.00634,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4578",
      "url": "https://patchblox.com/security/cve/CVE-2023-4578",
      "title": "Error reporting methods in SpiderMonkey could have triggered an Out of Memory Exception",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.00622,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4580",
      "url": "https://patchblox.com/security/cve/CVE-2023-4580",
      "title": "Push notifications saved to disk unencrypted",
      "priority": "High",
      "severity": "IMPORTANT",
      "cvss": 8.8,
      "epss": 0.00422,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-5171",
      "url": "https://patchblox.com/security/cve/CVE-2023-5171",
      "title": "Mozilla Firefox ESR and 5 others: During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing\u2026",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.01116,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-5169",
      "url": "https://patchblox.com/security/cve/CVE-2023-5169",
      "title": "Mozilla Firefox ESR and 5 others: A compromised content process could have provided malicious data in a \u0060PathRecording\u0060 resulting in an\u2026",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.01095,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-14T02:05:58Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}