What’s Vulnerable › Vulnerabilities

CVE-2019-8375

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-02-24 · updated 2026-06-17
• Weakness: CWE-119

Description

The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent the script dialog size from exceeding the web view size, which allows remote attackers to cause a denial of service (Buffer Overflow) or possibly have unspecified other impact, related to UIProcess/API/gtk/WebKitScriptDialogGtk.cpp, UIProcess/API/gtk/WebKitScriptDialogImpl.cpp, and UIProcess/API/gtk/WebKitWebViewGtk.cpp, as demonstrated by GNOME Web (aka Epiphany).

Affected products

• Canonical Ubuntu Linux: 18.04, 18.10
• openSUSE Leap: 15.0, 42.3
• Webkit: through 2.23.90
• Webkitgtk+: through 2.22.6

References

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html
• https://bugs.webkit.org/show_bug.cgi?id=184875
• https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531
• https://trac.webkit.org/changeset/241515/webkit
• https://usn.ubuntu.com/3948-1/
• https://www.exploit-db.com/exploits/46465/
• https://www.inputzero.io/2019/02/fuzzing-webkit.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html
• https://bugs.webkit.org/show_bug.cgi?id=184875
• https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531

Get alerted when CVE-2019-8375 or the next vulnerability affects your stack