CVE-2025-6558: Google Chrome ANGLE/GPU RCE Vulnerability

CVE-2025-6558 Overview

Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Critical Impact
This vulnerability can be exploited to achieve sandbox escape, allowing an attacker to execute malicious code outside of the browser's sandbox environment.

Affected Products

Google Chrome
Apple Safari
Debian Debian_Linux

Discovery Timeline

Not Available - Vulnerability discovered by Not Available
Not Available - Responsible disclosure to Google
Not Available - CVE CVE-2025-6558 assigned
Not Available - Google releases security patch
2025-07-15 - CVE CVE-2025-6558 published to NVD
2025-11-06 - Last updated in NVD database

Technical Details for CVE-2025-6558

Vulnerability Analysis

The CVE-2025-6558 vulnerability arises from insufficient validation of input received by ANGLE and the GPU process in Google Chrome. This can lead to out-of-bounds access during graphics processing, allowing malicious HTML content to escape the browser sandbox.

Root Cause

The input validation within the ANGLE and GPU subsystems fails to properly sanitize and verify certain attributes and commands, resulting in a security breach that could compromise the execution environment.

Attack Vector

The attack can be launched remotely over the network through specially crafted HTML pages that exploit the improper input handling.

cpp

// Example exploitation code (sanitized)
element->ValidateGPUInput(
    untrustedInput->GetWidth(),
    untrustedInput->GetHeight(),
    untrustedInput->GetFormat()
);

Detection Methods for CVE-2025-6558

Indicators of Compromise

Unexpected crash dumps in chrome://gpu
Abnormal process activity in GPU operations
Network traffic anomalies relating to HTML and graphics processing

Detection Strategies

Implement monitoring for changes in process isolation and utilize Chrome's logging capabilities to detect abnormal GPU operations associated with HTML handling.

Monitoring Recommendations

Enable detailed logging for GPU processes and inspect network traffic for unusual patterns indicative of an attack.

How to Mitigate CVE-2025-6558

Immediate Actions Required

Update Google Chrome to version 138.0.7204.157 or later
Deploy vendor-recommended security patches promptly
Conduct internal reviews of HTML content handling practices

Patch Information

The necessary patch addresses the input validation weaknesses in the ANGLE and GPU processes, preventing potential sandbox escape attacks.

Workarounds

Until patches are fully deployed, consider disabling JavaScript on non-trusted sites and restricting GPU processes where possible.

bash

# Configuration example
sudo apt-get update && 
sudo apt-get upgrade google-chrome-stable