CVE-2025-43343
published 2025-09-15CVE-2025-43343: The issue was addressed with improved memory handling. This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS…
PriorityP348critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.72%
49.7th percentile
The issue was addressed with improved memory handling. This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_26_and_ipados | — | — |
| apple | ios_and_ipados | < 26 | 26 |
| apple | ipados | < 26.0 | 26.0 |
| apple | iphone_os | < 26.0 | 26.0 |
| apple | macos | < 26 | 26 |
| apple | macos | < 26.0 | 26.0 |
| apple | macos_tahoe | — | — |
| apple | safari | < 26 | 26 |
| apple | safari | < 26.0 | 26.0 |
| apple | safari | — | — |
| apple | tvos | < 26 | 26 |
| apple | tvos | < 26.0 | 26.0 |
| apple | tvos | — | — |
| apple | visionos | < 26 | 26 |
| apple | visionos | < 26.0 | 26.0 |
| apple | visionos | — | — |
| apple | watchos | < 26 | 26 |
| apple | watchos | < 26.0 | 26.0 |
| apple | watchos | — | — |
| debian | webkit2gtk | < webkit2gtk 2.50.1-1~deb12u1 (bookworm) | webkit2gtk 2.50.1-1~deb12u1 (bookworm) |
| debian | wpewebkit | < webkit2gtk 2.50.1-1~deb12u1 (bookworm) | webkit2gtk 2.50.1-1~deb12u1 (bookworm) |
| webkitgtk | webkitgtk | < 2.50.1 | 2.50.1 |
| wpewebkit | wpe_webkit | < 2.50.1 | 2.50.1 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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Ubuntu
WebKitGTK vulnerabilities
vendor_ubuntu·2025-11-27
CVE-2025-43343 WebKitGTK vulnerabilities
Title: WebKitGTK vulnerabilities
Summary: Several security issues were fixed in WebKitGTK.
Several 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.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK, such as Epiphany, to make all the necessary changes.
Red Hat
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
vendor_redhat·2025-10-13·CVSS 9.8
CVE-2025-43343 [CRITICAL] CWE-119 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
The issue was addressed with improved memory handling. This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.
Statement: To exploit this flaw, an attacker needs to trick a user into processing or loading malicious web content.
Mitigation: Do not process or load untrusted web content with WebKitGTK.
In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-s
Apple
CVE-2025-43343: watchOS 26
vendor_apple·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: watchOS 26
Apple Security Update: About the security content of watchOS 26
Product: watchOS
Version: 26
CVE: CVE-2025-43343
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2025-43343: Safari 26
vendor_apple·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: Safari 26
Apple Security Update: About the security content of Safari 26
Product: Safari
Version: 26
CVE: CVE-2025-43343
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2025-43343: iOS 26 and iPadOS 26
vendor_apple·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: iOS 26 and iPadOS 26
Apple Security Update: About the security content of iOS 26 and iPadOS 26
Product: iOS 26 and iPadOS
Version: 26
CVE: CVE-2025-43343
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2025-43343: macOS Tahoe 26
vendor_apple·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: macOS Tahoe 26
Apple Security Update: About the security content of macOS Tahoe 26
Product: macOS Tahoe
Version: 26
CVE: CVE-2025-43343
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2025-43343: visionOS 26
vendor_apple·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: visionOS 26
Apple Security Update: About the security content of visionOS 26
Product: visionOS
Version: 26
CVE: CVE-2025-43343
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2025-43343: tvOS 26
vendor_apple·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: tvOS 26
Apple Security Update: About the security content of tvOS 26
Product: tvOS
Version: 26
CVE: CVE-2025-43343
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Debian
CVE-2025-43343: webkit2gtk - The issue was addressed with improved memory handling. This issue is fixed in Sa...
vendor_debian·2025·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: webkit2gtk - The issue was addressed with improved memory handling. This issue is fixed in Sa...
The issue was addressed with improved memory handling. This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
Scope: local
bookworm: resolved (fixed in 2.50.1-1~deb12u1)
bullseye: resolved (fixed in 2.50.1-1~deb11u1)
forky: resolved (fixed in 2.50.1-1)
sid: resolved (fixed in 2.50.1-1)
trixie: resolved (fixed in 2.50.1-1~deb13u1)
GHSA
GHSA-r357-mp92-7297: The issue was addressed with improved memory handling
ghsa_unreviewed·2025-09-16
CVE-2025-43343 [CRITICAL] CWE-119 GHSA-r357-mp92-7297: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in tvOS 26, Safari 26, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26 and iPadOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
OSV
CVE-2025-43343: The issue was addressed with improved memory handling
osv·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
OSV
CVE-2025-43343: The issue was addressed with improved memory handling
osv·2025-09-15·CVSS 9.8
CVE-2025-43343 [CRITICAL] CVE-2025-43343: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in Safari 26, tvOS 26, watchOS 26, iOS 26 and iPadOS 26, visionOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
No detection rules found.
No public exploits indexed.
https://support.apple.com/en-us/125108https://support.apple.com/en-us/125110https://support.apple.com/en-us/125113https://support.apple.com/en-us/125114https://support.apple.com/en-us/125115https://support.apple.com/en-us/125116http://seclists.org/fulldisclosure/2025/Sep/49http://seclists.org/fulldisclosure/2025/Sep/53http://seclists.org/fulldisclosure/2025/Sep/57http://seclists.org/fulldisclosure/2025/Sep/59http://www.openwall.com/lists/oss-security/2025/10/13/4https://access.redhat.com/errata/RHSA-2025:19946https://security-tracker.debian.org/tracker/CVE-2025-43343https://ubuntu.com/security/CVE-2025-43343https://webkitgtk.org/security/WSA-2025-0007.html
2025-09-15
Published