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Vulnerability record · CVE-2019-8375 · published 24 February 2019

CVE-2019-8375: Webkitgtk memory buffer overflow vulnerability

WWebkitgtk · Webkitgtk

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).

9.8 CVSS 3.0 Critical EPSS 16% · top 3.2% CWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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).

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html Mailing ListThird Party Advisory
https://bugs.webkit.org/show_bug.cgi?id=184875 Issue TrackingPermissions RequiredThird Party Advisory
https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531 PatchThird Party Advisory
https://trac.webkit.org/changeset/241515/webkit PatchVendor Advisory
https://usn.ubuntu.com/3948-1/ Third Party Advisory
https://www.exploit-db.com/exploits/46465/ ExploitThird Party AdvisoryVDB Entry
https://www.inputzero.io/2019/02/fuzzing-webkit.html ExploitThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html Mailing ListThird Party Advisory
https://bugs.webkit.org/show_bug.cgi?id=184875 Issue TrackingPermissions RequiredThird Party Advisory
https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531 PatchThird Party Advisory
https://trac.webkit.org/changeset/241515/webkit PatchVendor Advisory
https://usn.ubuntu.com/3948-1/ Third Party Advisory
https://www.exploit-db.com/exploits/46465/ ExploitThird Party AdvisoryVDB Entry
https://www.inputzero.io/2019/02/fuzzing-webkit.html ExploitThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-8375), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.