{
  "cveId": "CVE-2021-30858",
  "url": "https://patchblox.com/security/cve/CVE-2021-30858",
  "summary": "CVE-2021-30858 is fixed in 11 products on 1 platform, first by RHSA-2021:4097, released November 2, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021. Patch Radar priority: Patch now.",
  "title": "webkit2gtk3-jsc: WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform.\n\nSecurity Fix(es):\n\n* webkitgt...",
  "description": "WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform.\n\nSecurity Fix(es):\n\n* webkitgtk: Use-after-free leading to arbitrary code execution (CVE-2021-30858)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* WebProcess::initializeWebProcess crashing on aarch64 (BZ#2010825)",
  "published": "2021-08-24T12:15:00Z",
  "severity": "Moderate",
  "cvss": 8.8,
  "epss": 0.13379,
  "epssPercentile": 0.96446,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": false,
  "disclosed": false,
  "kev": {
    "added": "2021-11-03T00:00:00Z",
    "due": "2021-11-17T00:00:00Z",
    "ransomware": false,
    "requiredAction": "Apply updates per vendor instructions."
  },
  "fixes": [
    {
      "platform": "linux",
      "product": "gir1.2-javascriptcoregtk-4.0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "fix": "gir1.2-javascriptcoregtk-4.0 2.32.4-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-gir1.2-javascriptcoregtk-4.0-2.32.4-0ubuntu0.18.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-javascriptcoregtk-4.0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "gir1.2-javascriptcoregtk-4.0 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-gir1.2-javascriptcoregtk-4.0-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-webkit2-4.0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "fix": "gir1.2-webkit2-4.0 2.32.4-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-gir1.2-webkit2-4.0-2.32.4-0ubuntu0.18.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "gir1.2-webkit2-4.0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "gir1.2-webkit2-4.0 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-gir1.2-webkit2-4.0-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libjavascriptcoregtk-4.0-18",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "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",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libjavascriptcoregtk-4.0-18",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "libjavascriptcoregtk-4.0-18 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libjavascriptcoregtk-4.0-18-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libjavascriptcoregtk-4.0-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "fix": "libjavascriptcoregtk-4.0-bin 2.32.4-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libjavascriptcoregtk-4.0-bin-2.32.4-0ubuntu0.18.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libjavascriptcoregtk-4.0-bin",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "libjavascriptcoregtk-4.0-bin 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libjavascriptcoregtk-4.0-bin-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libwebkit2gtk-4.0-37",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "fix": "libwebkit2gtk-4.0-37 2.32.4-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libwebkit2gtk-4.0-37-2.32.4-0ubuntu0.18.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libwebkit2gtk-4.0-37",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "libwebkit2gtk-4.0-37 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libwebkit2gtk-4.0-37-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libwebkit2gtk-4.0-37-gtk2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "fix": "libwebkit2gtk-4.0-37-gtk2 2.32.4-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libwebkit2gtk-4.0-37-gtk2-2.32.4-0ubuntu0.18.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libwebkit2gtk-4.0-37-gtk2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "libwebkit2gtk-4.0-37-gtk2 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libwebkit2gtk-4.0-37-gtk2-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk-driver",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.32.4-0ubuntu0.18.04.1",
      "fix": "webkit2gtk-driver 2.32.4-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-webkit2gtk-driver-2.32.4-0ubuntu0.18.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk-driver",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.32.4-0ubuntu0.20.04.1",
      "fix": "webkit2gtk-driver 2.32.4-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-webkit2gtk-driver-2.32.4-0ubuntu0.20.04.1",
      "released": "2021-12-24T17:15:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3",
      "release": "RHEL 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "RHSA-2021:4097",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3",
      "release": "ol 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "ELSA-2021-4097",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "RHSA-2021:4097",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "ELSA-2021-4097",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3-jsc",
      "release": "RHEL 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "RHSA-2021:4097",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3-jsc",
      "release": "ol 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "ELSA-2021-4097",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3-jsc-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "RHSA-2021:4097",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "webkit2gtk3-jsc-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.30.4-3.el8_4",
      "fix": "ELSA-2021-4097",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4097",
      "released": "2021-11-02T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}