CVE-2019-8375
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 15.7%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 15.70% probability · 97th percentile
- Public exploits
- 1 in Exploit-DB · first 28 February 2019
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- webkitgtk/webkitgtk · webkitgtk/webkitgtk\+ · opensuse/leap · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS moved from 13.2% on 21 September 2026 to 15.7% on 3 November 2026, peaking at 16.1% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.htmlMailing List, Third Party Advisory
- https://bugs.webkit.org/show_bug.cgi?id=184875Issue Tracking, Permissions Required, Third Party Advisory
- https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531Patch, Third Party Advisory
- https://trac.webkit.org/changeset/241515/webkitPatch, Vendor Advisory
- https://usn.ubuntu.com/3948-1/Third Party Advisory
- https://www.exploit-db.com/exploits/46465/Exploit, Third Party Advisory, VDB Entry
- https://www.inputzero.io/2019/02/fuzzing-webkit.htmlExploit, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.htmlMailing List, Third Party Advisory
- https://bugs.webkit.org/show_bug.cgi?id=184875Issue Tracking, Permissions Required, Third Party Advisory
- https://github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531Patch, Third Party Advisory
- https://trac.webkit.org/changeset/241515/webkitPatch, Vendor Advisory
- https://usn.ubuntu.com/3948-1/Third Party Advisory
- https://www.exploit-db.com/exploits/46465/Exploit, Third Party Advisory, VDB Entry
- https://www.inputzero.io/2019/02/fuzzing-webkit.htmlExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.