Use-after-free in WebKitGTK+ and WPE WebKit - CVE-2025-43529

Vulnerability identifier: #VU119902

CSH Severity: Critical

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-43529

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing HTML content. A remote attacker can trick the victim into visiting a specially crafted website, trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild. 

WebKitGTK+
WPE WebKit
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP6
Debian Linux
SUSE Manager Server 4.3
SUSE Manager Retail Branch Server 4.3
SUSE Manager Proxy 4.3
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
visionOS
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
watchOS
Basesystem Module
Desktop Applications Module
Development Tools Module
openSUSE Leap
tvOS
iPadOS
Apple iOS
Ubuntu
macOS
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
webkit2gtk (Ubuntu package)
javascriptcoregtk6.0
javascriptcoregtk6.0-devel
webkit2gtk4.1
webkit2gtk4.1-devel
webkitgtk6.0
javascriptcoregtk4.1-devel
javascriptcoregtk4.1
webkitgtk6.0-doc
webkit2gtk4.1-doc
webkitgtk6.0-devel
webkit2gtk3 (Red Hat package)
webkit2gtk (Debian package)
webkit2gtk3-devel
webkit2gtk3-jsc
webkit2gtk3-jsc-devel
webkit2gtk3
webkitgtk4-doc
webkitgtk4
webkitgtk4-devel
webkitgtk4-jsc
webkitgtk4-jsc-devel
webkitgtk4 (Red Hat package)
webkit2gtk3-debugsource
libjavascriptcoregtk-4_0-18
libjavascriptcoregtk-4_0-18-debuginfo
typelib-1_0-WebKit2WebExtension-4_0
typelib-1_0-JavaScriptCore-4_0
typelib-1_0-WebKit2-4_0
webkit2gtk-4_0-injected-bundles
libwebkit2gtk-4_0-37-debuginfo
libwebkit2gtk3-lang
webkit2gtk-4_0-injected-bundles-debuginfo
libwebkit2gtk-4_0-37
libjavascriptcoregtk-4_0-18-32bit-debuginfo
webkit-jsc-4
webkit2gtk3-soup2-minibrowser
webkit-jsc-4-debuginfo
webkit2gtk3-soup2-minibrowser-debuginfo
webkit2gtk3-soup2-devel
libwebkit2gtk-4_0-37-32bit-debuginfo
libwebkit2gtk-4_0-37-32bit
libjavascriptcoregtk-4_0-18-32bit
libjavascriptcoregtk-4_0-18-64bit
libwebkit2gtk-4_0-37-64bit
libwebkit2gtk-4_0-37-64bit-debuginfo
libjavascriptcoregtk-4_0-18-64bit-debuginfo
WebKitGTK-4.0-lang
webkit2gtk3-soup2-debugsource
webkit2gtk4-minibrowser
webkit2gtk3-minibrowser
libwebkitgtk-6_0-4-debuginfo
webkit2gtk4-debugsource
typelib-1_0-JavaScriptCore-4_1
libjavascriptcoregtk-4_1-0-debuginfo
WebKitGTK-4.1-lang
webkit2gtk-4_1-injected-bundles-debuginfo
webkit-jsc-6.0-debuginfo
libjavascriptcoregtk-6_0-1
WebKitGTK-6.0-lang
libjavascriptcoregtk-6_0-1-debuginfo
webkit-jsc-6.0
typelib-1_0-JavaScriptCore-6_0
libjavascriptcoregtk-4_1-0-64bit
libwebkit2gtk-4_1-0-64bit-debuginfo
libwebkit2gtk-4_1-0
webkit2gtk3-minibrowser-debuginfo
typelib-1_0-WebKit-6_0
webkit2gtk4-minibrowser-debuginfo
webkitgtk-6_0-injected-bundles-debuginfo
webkit-jsc-4.1
typelib-1_0-WebKit2WebExtension-4_1
webkitgtk-6_0-injected-bundles
webkit-jsc-4.1-debuginfo
libwebkitgtk-6_0-4
typelib-1_0-WebKit2-4_1
webkit2gtk-4_1-injected-bundles
typelib-1_0-WebKitWebProcessExtension-6_0
libwebkit2gtk-4_1-0-64bit
libjavascriptcoregtk-4_1-0-64bit-debuginfo
libwebkit2gtk-4_1-0-32bit
libwebkit2gtk-4_1-0-32bit-debuginfo
libjavascriptcoregtk-4_1-0-32bit
libjavascriptcoregtk-4_1-0-32bit-debuginfo
libwebkit2gtk-4_1-0-debuginfo
libjavascriptcoregtk-4_1-0
webkit2gtk4-devel
Apple Safari

Install update from vendor's website.

WebKitGTK+ - update to 2.50.4
WPE WebKit - update to 2.50.4
visionOS - addressed in versions 26.2, 26.3
watchOS - addressed in versions 26.2 23S303, 26.3 23S620
Apple Safari - update to 26.2
tvOS - addressed in versions 26.2 23K54, 26.3 23K620
iPadOS - addressed in versions 18.7.3 22H217, 26.2 23C55, 26.3 23D127
Apple iOS - addressed in versions 18.7.3 22H217, 26.2 23C55, 26.3 23D127
macOS - addressed in versions 26.2 25C56, 26.3 25D125
webkit2gtk (Ubuntu package) - addressed in versions 2.50.4-0ubuntu0.22.04.1, 2.50.4-0ubuntu0.24.04.1, 2.50.4-0ubuntu0.25.04.1, 2.50.4-0ubuntu0.25.10.1
javascriptcoregtk6.0 - update to 2.50.4-1
javascriptcoregtk6.0-devel - update to 2.50.4-1
webkit2gtk4.1 - update to 2.50.4-1
webkit2gtk4.1-devel - update to 2.50.4-1
webkitgtk6.0 - update to 2.50.4-1
javascriptcoregtk4.1-devel - update to 2.50.4-1
javascriptcoregtk4.1 - update to 2.50.4-1
webkitgtk6.0-doc - update to 2.50.4-1
webkit2gtk4.1-doc - update to 2.50.4-1
webkitgtk6.0-devel - update to 2.50.4-1
webkit2gtk3 (Red Hat package) - addressed in versions 2.50.4-1.el8_2, 2.50.4-1.el8_4, 2.50.4-1.el8_6, 2.50.4-1.el8_8, 2.50.4-1.el8_10, 2.50.4-1.el9_0, 2.50.4-1.el9_2, 2.50.4-1.el9_4, 2.50.4-1.el9_6, 2.50.4-1.el9_7
webkit2gtk (Debian package) - addressed in versions 2.50.4-1~deb12u1, 2.50.4-1~deb13u1
webkit2gtk3-devel - update to 2.50.4-1.0.1
webkit2gtk3-jsc - update to 2.50.4-1.0.1
webkit2gtk3-jsc-devel - update to 2.50.4-1.0.1
webkit2gtk3 - update to 2.50.4-1.0.1
webkitgtk4-doc - update to 2.50.4-2
webkitgtk4 - update to 2.50.4-2
webkitgtk4-devel - update to 2.50.4-2
webkitgtk4-jsc - update to 2.50.4-2
webkitgtk4-jsc-devel - update to 2.50.4-2
webkitgtk4 (Red Hat package) - update to 2.50.4-2.el7_9
webkit2gtk3-debugsource - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_0-18 - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_0-18-debuginfo - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
typelib-1_0-WebKit2WebExtension-4_0 - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
typelib-1_0-JavaScriptCore-4_0 - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
typelib-1_0-WebKit2-4_0 - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit2gtk3-devel - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk-4_0-injected-bundles - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk-4_0-37-debuginfo - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk3-lang - update to 2.50.4-4.51.1
webkit2gtk-4_0-injected-bundles-debuginfo - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk-4_0-37 - addressed in versions 2.50.4-4.51.1, 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_0-18-32bit-debuginfo - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit-jsc-4 - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit2gtk3-soup2-minibrowser - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit-jsc-4-debuginfo - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit2gtk3-soup2-minibrowser-debuginfo - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit2gtk3-soup2-devel - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk-4_0-37-32bit-debuginfo - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk-4_0-37-32bit - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_0-18-32bit - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_0-18-64bit - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk-4_0-37-64bit - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libwebkit2gtk-4_0-37-64bit-debuginfo - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_0-18-64bit-debuginfo - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
WebKitGTK-4.0-lang - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit2gtk3-soup2-debugsource - addressed in versions 2.50.4-150400.4.134.1, 2.50.4-150600.12.54.1
webkit2gtk4-minibrowser - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk3-minibrowser - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkitgtk-6_0-4-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk4-debugsource - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
typelib-1_0-JavaScriptCore-4_1 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
WebKitGTK-4.1-lang - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk-4_1-injected-bundles-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit-jsc-6.0-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-6_0-1 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
WebKitGTK-6.0-lang - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-6_0-1-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit-jsc-6.0 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
typelib-1_0-JavaScriptCore-6_0 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0-64bit - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0-64bit-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk3-minibrowser-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
typelib-1_0-WebKit-6_0 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk4-minibrowser-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkitgtk-6_0-injected-bundles-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit-jsc-4.1 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
typelib-1_0-WebKit2WebExtension-4_1 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkitgtk-6_0-injected-bundles - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit-jsc-4.1-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkitgtk-6_0-4 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
typelib-1_0-WebKit2-4_1 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk-4_1-injected-bundles - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
typelib-1_0-WebKitWebProcessExtension-6_0 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0-64bit - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0-64bit-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0-32bit - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0-32bit-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0-32bit - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0-32bit-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0-debuginfo - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0 - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1
webkit2gtk4-devel - addressed in versions 2.50.4-150400.4.134.2, 2.50.4-150600.12.54.1

• Exploit #12997 - WebKit-UAF-ANGLE-OOB-Analysis (Analysis of CVE-2025-43529 (WebKit UAF) + CVE-2025-14174 (ANGLE OOB) exploit chain - iOS Safari) (August 31, 2026)
• Exploit #12769 - pois0nSword (June 23, 2026)
• Exploit #12363 - Convergent-Time-Theory-Enhanced-iOS-Safari-RCE-CVE-2025-43529- (CTT-Enhanced iOS Safari Exploit (based on CVE-2025-43529)) (February 6, 2026)
• Exploit #12299 - WebKit-UAF-ANGLE-OOB-Analysis (January 16, 2026)
• Exploit #12291 - CVE-2025-43529 (January 9, 2026)

• https://support.apple.com/en-us/125885
• https://webkitgtk.org/security/WSA-2025-0010.html

• Multiple vulnerabilities in WebKitGTK+ and WPE WebKit
• Multiple vulnerabilities in Safari
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26
• Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
• Debian update for webkit2gtk
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 8 update for webkit2gtk3
• Red Hat Enterprise Linux 9 update for webkit2gtk3
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for webkitgtk4
• Anolis OS update for webkit2gtk3
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• Ubuntu update for webkit2gtk
• Anolis OS update for webkitgtk
• Anolis OS update for webkitgtk4
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in Apple visionOS
• Multiple vulnerabilities in Apple watchOS
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple iOS 26 and iPadOS 26