Google Chrome Dawn Use-After-Free Vulnerability (CVE-2026-5281) Technical Advisory

1. Apply Official Security Patch

The primary remediation is to update Google Chrome to the latest patched version.

• Manual Update (Desktop):
• Open Chrome and click the three dots menu in the top right corner.
• Navigate to Help -> About Google Chrome.
• Chrome will automatically check for updates and install them. Click Relaunch to complete the process.

2. Enterprise Group Policy (GPO) Enforcement

For enterprise environments, enforce automatic updates to prevent users from delaying critical security patches.

• Windows Registry Configuration:

  reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update" /v UpdateDefault /t REG_DWORD /d 1 /f
  reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update" /v AutoUpdateCheckPeriodMinutes /t REG_DWORD /d 60 /f

3. Temporary Mitigation (Disable WebGPU)

If immediate patching is not feasible, mitigate the attack vector by disabling WebGPU via command-line flags:

• Launch Chrome with the following parameter: --disable-features=WebGPU

This vulnerability (CVE-2026-5281) is a Use-After-Free (UAF) flaw within Dawn, the WebGPU implementation engine utilized in Google Chrome.

An attacker who has already compromised the renderer process can trigger this vulnerability by enticing a user to visit a specially crafted HTML page. By manipulating the lifecycle of memory objects within the Dawn engine, the attacker can reference memory that has already been freed, leading to arbitrary code execution (RCE) or a complete browser crash (Denial of Service).

With a CVSS score of 8.8 and an EPSS score of 0.94, this vulnerability is highly critical. It has been added to the CISA Known Exploited Vulnerabilities (KEV) Catalog, indicating active exploitation in the wild. Immediate remediation is strongly advised.