Use-after-free in WebKitGTK+ and WPE WebKit - CVE-2025-43438

Vulnerability identifier: #VU117963

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-43438

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a use-after-free error in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.

WebKitGTK+
WPE WebKit
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
visionOS
Basesystem Module
Desktop Applications Module
Development Tools Module
openSUSE Leap
iPadOS
Apple iOS
macOS
watchOS
Apple Safari
webkit2gtk-4_0-injected-bundles-debuginfo
libwebkit2gtk3-lang
webkit2gtk3-devel
libwebkit2gtk-4_0-37
typelib-1_0-WebKit2-4_0
webkit2gtk-4_0-injected-bundles
libwebkit2gtk-4_0-37-debuginfo
libjavascriptcoregtk-4_0-18-debuginfo
typelib-1_0-WebKit2WebExtension-4_0
typelib-1_0-JavaScriptCore-4_0
webkit2gtk3-debugsource
libjavascriptcoregtk-4_0-18
libjavascriptcoregtk-4_1-0-debuginfo
webkit2gtk3-soup2-minibrowser
libwebkitgtk-6_0-4
typelib-1_0-WebKit2-4_1
libwebkitgtk-6_0-4-debuginfo
libjavascriptcoregtk-4_1-0-32bit
webkit2gtk-4_1-injected-bundles
webkit2gtk3-soup2-debugsource
webkit2gtk3-soup2-minibrowser-debuginfo
webkit-jsc-4
libwebkit2gtk-4_1-0
webkit2gtk4-minibrowser-debuginfo
typelib-1_0-WebKit-6_0
webkit-jsc-4.1
webkit2gtk4-devel
webkitgtk-6_0-injected-bundles
webkit2gtk-4_1-injected-bundles-debuginfo
libwebkit2gtk-4_1-0-32bit-debuginfo
libjavascriptcoregtk-4_1-0-32bit-debuginfo
libwebkit2gtk-4_1-0-32bit
libwebkit2gtk-4_0-37-32bit-debuginfo
libjavascriptcoregtk-4_0-18-32bit-debuginfo
libjavascriptcoregtk-4_0-18-32bit
libwebkit2gtk-4_0-37-32bit
libwebkit2gtk-4_1-0-64bit
libjavascriptcoregtk-4_0-18-64bit
webkit2gtk4-minibrowser
libwebkit2gtk-4_0-37-64bit
libjavascriptcoregtk-4_1-0-64bit
libwebkit2gtk-4_1-0-64bit-debuginfo
libwebkit2gtk-4_0-37-64bit-debuginfo
libjavascriptcoregtk-4_0-18-64bit-debuginfo
libjavascriptcoregtk-4_1-0-64bit-debuginfo
WebKitGTK-4.1-lang
WebKitGTK-4.0-lang
WebKitGTK-6.0-lang
webkitgtk-6_0-injected-bundles-debuginfo
webkit-jsc-4-debuginfo
libjavascriptcoregtk-6_0-1
webkit-jsc-6.0
typelib-1_0-JavaScriptCore-4_1
libwebkit2gtk-4_1-0-debuginfo
webkit2gtk3-minibrowser
webkit2gtk3-soup2-devel
webkit-jsc-4.1-debuginfo
typelib-1_0-WebKitWebProcessExtension-6_0
webkit2gtk4-debugsource
webkit2gtk3-minibrowser-debuginfo
typelib-1_0-WebKit2WebExtension-4_1
libjavascriptcoregtk-6_0-1-debuginfo
libjavascriptcoregtk-4_1-0
webkit-jsc-6.0-debuginfo
typelib-1_0-JavaScriptCore-6_0

Install updates from vendor's website.

WebKitGTK+ - update to 2.50.2
WPE WebKit - update to 2.50.2
visionOS - update to 26.1
Apple Safari - update to 26.1
iPadOS - addressed in versions 18.7.2 22H124, 26.1 23B85
Apple iOS - addressed in versions 18.7.2 22H124, 26.1 23B85
macOS - update to 26.1 25B78
watchOS - update to 26.1 23S37
webkit2gtk-4_0-injected-bundles-debuginfo - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk3-lang - update to 2.52.0-4.54.1
webkit2gtk3-devel - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37 - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2-4_0 - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk-4_0-injected-bundles - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-debuginfo - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-debuginfo - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2WebExtension-4_0 - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-JavaScriptCore-4_0 - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-debugsource - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18 - addressed in versions 2.52.0-4.54.1, 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-minibrowser - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkitgtk-6_0-4 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2-4_1 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkitgtk-6_0-4-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-32bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk-4_1-injected-bundles - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-debugsource - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-minibrowser-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit-jsc-4 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk4-minibrowser-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-WebKit-6_0 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit-jsc-4.1 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk4-devel - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkitgtk-6_0-injected-bundles - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk-4_1-injected-bundles-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-32bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-32bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-32bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-32bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-32bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-32bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-32bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-64bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-64bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk4-minibrowser - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-64bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-64bit - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-64bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_0-37-64bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_0-18-64bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0-64bit-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
WebKitGTK-4.1-lang - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
WebKitGTK-4.0-lang - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
WebKitGTK-6.0-lang - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkitgtk-6_0-injected-bundles-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit-jsc-4-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-6_0-1 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit-jsc-6.0 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-JavaScriptCore-4_1 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libwebkit2gtk-4_1-0-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-minibrowser - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-soup2-devel - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit-jsc-4.1-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-WebKitWebProcessExtension-6_0 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk4-debugsource - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit2gtk3-minibrowser-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-WebKit2WebExtension-4_1 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-6_0-1-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
libjavascriptcoregtk-4_1-0 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
webkit-jsc-6.0-debuginfo - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1
typelib-1_0-JavaScriptCore-6_0 - addressed in versions 2.52.0-150400.4.137.3, 2.52.1-150600.12.63.1

• https://support.apple.com/en-us/125634
• https://webkitgtk.org/security/WSA-2026-0001.html

• Multiple vulnerabilities in WebKitGTK+ and WPE WebKit
• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3