{
  "fix": "libjavascriptcoregtk-4.0-18 2.32.4-0ubuntu0.18.04.1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libjavascriptcoregtk-4.0-18-2.32.4-0ubuntu0.18.04.1",
  "summary": "libjavascriptcoregtk-4.0-18 2.32.4-0ubuntu0.18.04.1, released December 24, 2021, fixes 6 CVEs in libjavascriptcoregtk-4.0-18. One of them is being exploited (CVE-2021-30858); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "libjavascriptcoregtk-4.0-18 2.32.4-0ubuntu0.18.04.1 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2021-12-24T17:15:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2021-30858, exploited (CISA KEV)",
  "supported": false,
  "cveCount": 6,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.13379,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "libjavascriptcoregtk-4.0-18",
      "productUrl": "https://patchblox.com/security/product/linux/libjavascriptcoregtk-4.0-18",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-30858",
      "url": "https://patchblox.com/security/cve/CVE-2021-30858",
      "title": "webkit2gtk3-jsc: webkitgtk: Use-after-free leading to arbitrary code execution",
      "priority": "Patch now",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.13379,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30849",
      "url": "https://patchblox.com/security/cve/CVE-2021-30849",
      "title": "iTunes: Multiple memory corruption issues were addressed with improved memory handling.",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.01904,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-45482",
      "url": "https://patchblox.com/security/cve/CVE-2021-45482",
      "title": "webkit2gtk3-devel: ELSA-2022-1777: webkit2gtk3 security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.01532,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30809",
      "url": "https://patchblox.com/security/cve/CVE-2021-30809",
      "title": "webkit2gtk3-jsc-devel: ELSA-2022-1777: webkit2gtk3 security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.01511,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30848",
      "url": "https://patchblox.com/security/cve/CVE-2021-30848",
      "title": "webkit2gtk3-jsc: ELSA-2022-1777: webkit2gtk3 security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.0127,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30836",
      "url": "https://patchblox.com/security/cve/CVE-2021-30836",
      "title": "gir1.2-javascriptcoregtk-4.0: An out-of-bounds read was addressed with improved input validation",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.01104,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-12T13:55:20Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}