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CVE-2019-8375

The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2...

9.8 CriticalPublic exploitFix available

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).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

15.7%Up 3.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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).

Record
CVE-2019-8375
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-119
Updated
2026-11-02
CVE List No score

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).

Record
CVE-2019-8375
Updated
2026-11-02
EUVDEUVD-2019-17765 No score

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).

Record
EUVD-2019-17765
Updated
2026-11-03
GitHub AdvisoriesGHSA-f6vf-7m59-gfmp 9.8

The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2...

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).

Record
GHSA-f6vf-7m59-gfmp
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-119
Updated
2026-11-02
OSV 9.8

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).

Record
CVE-2019-8375
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-8375 9.8

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).

Record
DEBIAN-CVE-2019-8375
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVUBUNTU-CVE-2019-8375 9.8

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).

Record
UBUNTU-CVE-2019-8375
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2019:1206-1 No score

Security update for webkit2gtk3

This update for webkit2gtk3 to version 2.24.0 fixes the following issue:

Security issue fixed:

  • CVE-2019-8375: Fixed an issue in UIProcess subsystem which could allow the script dialog size to exceed the web view size leading to Buffer Overflow or other unspecified impact (bsc#1126768).

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2019:1206-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11506-1 No score

libjavascriptcoregtk-4_0-18-2.32.4-1.1 on GA media

These are all security issues fixed in the libjavascriptcoregtk-4_0-18-2.32.4-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11506-1
Updated
2026-11-02
OSVSUSE-SU-2019:0890-1 No score

Security update for webkit2gtk3

This update for webkit2gtk3 to version 2.24.0 fixes the following issue:

Security issue fixed:

  • CVE-2019-8375: Fixed an issue in UIProcess subsystem which could allow the script dialog size to exceed the web view size leading to Buffer Overflow or other unspecified impact (bsc#1126768).
Record
SUSE-SU-2019:0890-1
Updated
2026-11-02
OSVSUSE-SU-2019:1030-1 No score

Security update for webkit2gtk3

This update for webkit2gtk3 fixes the following issues:

Security issue fixed:

  • CVE-2019-8375: Fixed an issue in UIProcess subsystem which could allow the script dialog size to exceed the web view size leading to Buffer Overflow or other unspecified impact (bsc#1126768).
Record
SUSE-SU-2019:1030-1
Updated
2026-11-02
OSVUSN-3948-1 No score

webkit2gtk vulnerabilities

A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Record
USN-3948-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
webkit2gtk
Debian:12
 before 2.24.1-1
2.24.1-1
webkit2gtk
Debian:13
 before 2.24.1-1
2.24.1-1
webkit2gtk
Debian:14
 before 2.24.1-1
2.24.1-1
webkit2gtk3
SUSE:Linux Enterprise Module for Basesystem 15
 before 2.24.0-3.21.1
2.24.0-3.21.1
webkit2gtk3
SUSE:Linux Enterprise Module for Desktop Applications 15
 before 2.24.0-3.21.1
2.24.0-3.21.1
webkit2gtk3
SUSE:Linux Enterprise Desktop 12 SP3
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Desktop 12 SP4
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Software Development Kit 12 SP3
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Software Development Kit 12 SP4
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Server 12 SP3
 before 2.24.0-2.38.2
2.24.0-2.38.2
Show 19 moreShow less
Affected packages
PackageAffectedFixed
webkit2gtk3
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Server 12 SP4
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Workstation Extension 12 SP3
 before 2.24.0-2.38.2
2.24.0-2.38.2
webkit2gtk3
SUSE:Linux Enterprise Workstation Extension 12 SP4
 before 2.24.0-2.38.2
2.24.0-2.38.2
qtwebkit-opensource-src
Ubuntu:16.04:LTS
 All versions, plus listed versions
5.4.2+dfsg-1ubuntu2.15.5.1+dfsg-2ubuntu1
 None known
webkit2gtk
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.8.5+dfsg1-32.10.3+dfsg1-12.10.4+dfsg1-12.10.5-12.10.6-1
Show 21 moreShow less
2.10.6-1ubuntu12.10.8-1ubuntu12.10.9-1ubuntu12.12.5-0ubuntu0.16.04.12.14.2-0ubuntu0.16.04.12.14.3-0ubuntu0.16.04.12.14.5-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.22.16.2-0ubuntu0.16.04.12.16.3-0ubuntu0.16.04.12.16.6-0ubuntu0.16.04.12.18.0-0ubuntu0.16.04.22.18.3-0ubuntu0.16.04.12.18.4-0ubuntu0.16.04.12.18.5-0ubuntu0.16.04.12.18.6-0ubuntu0.16.04.12.20.1-0ubuntu0.16.04.12.20.2-0ubuntu0.16.04.12.20.3-0ubuntu0.16.04.12.20.5-0ubuntu0.16.04.1
 None known
qtwebkit-source
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.3.2-0ubuntu102.3.2-0ubuntu11
 None known
webkitgtk
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.4.9-2ubuntu22.4.10-0ubuntu12.4.11-0ubuntu0.1
 None known
webkit2gtk
Ubuntu:18.04:LTS
 before 2.24.1-0ubuntu0.18.04.1, plus listed versions
2.18.0-22.18.0-2build12.18.2-12.18.3-12.18.4-1
Show 15 moreShow less
2.18.6-12.19.91-1ubuntu12.19.92-12.20.0-12.20.0-22.20.0-2ubuntu12.20.1-12.20.2-0ubuntu0.18.04.12.20.3-0ubuntu0.18.04.12.20.5-0ubuntu0.18.04.12.22.2-0ubuntu0.18.04.12.22.2-0ubuntu0.18.04.22.22.4-0ubuntu0.18.04.12.22.5-0ubuntu0.18.04.12.22.6-0ubuntu0.18.04.1
2.24.1-0ubuntu0.18.04.1
qtwebkit-opensource-src
Ubuntu:18.04:LTS
 All versions, plus listed versions
5.9.1+dfsg-5ubuntu15.9.1+dfsg-5ubuntu35.212.0~alpha2-5build25.212.0~alpha2-5build45.212.0~alpha2-75.212.0~alpha2-7build25.212.0~alpha2-7ubuntu1
 None known
qtwebkit-source
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.3.2-0ubuntu13
 None known
webkitgtk
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.4.11-32.4.11-3ubuntu22.4.11-3ubuntu3
 None known
qtwebkit-opensource-src
Ubuntu:20.04:LTS
 All versions, plus listed versions
5.212.0~alpha3-35.212.0~alpha3-55.212.0~alpha3-65.212.0~alpha3-75.212.0~alpha4-15.212.0~alpha4-1ubuntu15.212.0~alpha4-1ubuntu25.212.0~alpha4-1ubuntu2.1
 None known
qtwebkit-opensource-src
Ubuntu:22.04:LTS
 All versions, plus listed versions
5.212.0~alpha4-125.212.0~alpha4-135.212.0~alpha4-145.212.0~alpha4-14build15.212.0~alpha4-14ubuntu25.212.0~alpha4-15ubuntu1
 None known
qtwebkit-opensource-src
Ubuntu:24.04:LTS
 All versions, plus listed versions
5.212.0~alpha4-335.212.0~alpha4-33build15.212.0~alpha4-345.212.0~alpha4-34ubuntu35.212.0~alpha4-34ubuntu45.212.0~alpha4-36
 None known
webkit2gtk
Ubuntu:18.04:LTS
From an advisory covering 14 CVEs
 before 2.24.1-0ubuntu0.18.04.1, plus listed versions
2.18.0-22.18.0-2build12.18.2-12.18.3-12.18.4-1
Show 15 moreShow less
2.18.6-12.19.91-1ubuntu12.19.92-12.20.0-12.20.0-22.20.0-2ubuntu12.20.1-12.20.2-0ubuntu0.18.04.12.20.3-0ubuntu0.18.04.12.20.5-0ubuntu0.18.04.12.22.2-0ubuntu0.18.04.12.22.2-0ubuntu0.18.04.22.22.4-0ubuntu0.18.04.12.22.5-0ubuntu0.18.04.12.22.6-0ubuntu0.18.04.1
2.24.1-0ubuntu0.18.04.1
webkit2gtk3
openSUSE:Leap 15.0
 before 2.24.0-lp150.2.16.1
2.24.0-lp150.2.16.1
gtk3
openSUSE:Tumbleweed
From an advisory covering 126 CVEs
 before 2.32.4-1.1
2.32.4-1.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBWebKitGTK 2.23.90 / WebKitGTK+ 2.22.6 - Denial of Service2019-02-28

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-8375 is a critical vulnerability (CVSS 9.8) in Webkitgtk, published February 24, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 15.7%, the 96th percentile. Fixed in webkit2gtk 2.24.1-1.

References

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