Use-after-free in WebKitGTK+ and WPE WebKit - CVE-2025-43529
Published: December 13, 2025 / Updated: February 6, 2026
Vulnerability identifier: #VU119902
CSH Severity: Critical
CVSS v4.0: 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/E:A/U:Red
CVE-ID: CVE-2025-43529
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: WebKitGTK
Affected software:
WebKitGTK+
WPE WebKit
WebKitGTK+
WPE WebKit
Detailed vulnerability description
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.
How to mitigate CVE-2025-43529
Install update from vendor's website.