CVE-2025-13042: Google Chrome V8 RCE Vulnerability

CVE-2025-13042 Overview

CVE-2025-13042 is an inappropriate implementation vulnerability in the V8 JavaScript engine used by Google Chrome prior to version 142.0.7444.166. This flaw allows a remote attacker to potentially exploit heap corruption through a specially crafted HTML page. The vulnerability has been assigned a high severity rating by the Chromium security team.

Critical Impact

Remote attackers can exploit this heap corruption vulnerability to potentially execute arbitrary code or cause denial of service by enticing users to visit a malicious webpage.

Affected Products

• Google Chrome versions prior to 142.0.7444.166
• Google Chrome on Microsoft Windows
• Google Chrome on Apple macOS
• Google Chrome on Linux

Discovery Timeline

• 2025-11-12 - CVE-2025-13042 published to NVD
• 2025-11-25 - Last updated in NVD database

Technical Details for CVE-2025-13042

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation within Google Chrome's V8 JavaScript engine—the core component responsible for executing JavaScript code in the browser. The flaw is classified under CWE-787 (Out-of-Bounds Write), indicating that the vulnerability allows writing data outside the intended memory boundaries.

V8 is a high-performance JavaScript and WebAssembly engine developed by Google, and it handles complex memory operations during code compilation and execution. When processing certain JavaScript constructs or HTML content, the engine can be induced into corrupting heap memory structures. This heap corruption can potentially be leveraged by attackers to achieve arbitrary code execution within the context of the browser process.

The vulnerability requires user interaction—specifically, a victim must navigate to an attacker-controlled webpage containing the malicious HTML payload. However, this interaction barrier is relatively low, as users can be easily directed to malicious sites through phishing emails, compromised advertisements, or social engineering tactics.

Root Cause

The root cause of CVE-2025-13042 is an inappropriate implementation in V8's memory management routines. Specifically, there is insufficient validation or improper handling of certain operations that lead to out-of-bounds write conditions in heap memory. This allows attacker-controlled data to overwrite adjacent memory regions, potentially corrupting internal data structures or function pointers used by the JavaScript engine.

Attack Vector

The attack vector for this vulnerability is network-based, requiring an attacker to host a malicious HTML page containing crafted content designed to trigger the V8 implementation flaw. The attack scenario typically unfolds as follows:

1. The attacker creates a webpage with specially crafted HTML and JavaScript that targets the V8 vulnerability
2. The victim is lured to visit this malicious webpage through phishing, malvertising, or other social engineering techniques
3. When Chrome's V8 engine processes the malicious content, heap corruption occurs
4. The attacker may chain this corruption primitive with additional techniques to achieve code execution or other malicious outcomes

The vulnerability can be exploited without any special privileges on the target system and does not require the victim to be authenticated. The primary constraint is that user interaction (visiting the malicious page) is required to initiate the exploit.

For detailed technical analysis of the vulnerability mechanism, refer to the Chromium Issue Tracker Entry.

Detection Methods for CVE-2025-13042

Indicators of Compromise

• Unusual Chrome browser crashes or instability when visiting certain websites
• Unexpected child processes spawned by the Chrome browser process
• Chrome processes accessing unusual system resources or network endpoints
• Memory access violations or exceptions logged in system event logs

Detection Strategies

• Monitor Chrome version deployments across the enterprise to identify systems running vulnerable versions prior to 142.0.7444.166
• Deploy browser-based exploit detection solutions that monitor JavaScript engine behavior for anomalous memory operations
• Implement network-level inspection for malicious HTML patterns targeting V8 vulnerabilities
• Configure endpoint detection and response (EDR) solutions to alert on suspicious Chrome process behaviors

Monitoring Recommendations

• Enable Chrome's built-in crash reporting and monitor for patterns indicative of exploitation attempts
• Implement centralized logging for browser security events across all managed endpoints
• Monitor for unusual network traffic patterns from Chrome processes, particularly connections to newly registered or low-reputation domains
• Track browser extension installations and web content access patterns for anomalies

How to Mitigate CVE-2025-13042

Immediate Actions Required

• Update Google Chrome to version 142.0.7444.166 or later on all affected systems
• Enable automatic updates in Chrome to ensure timely deployment of future security patches
• Conduct an inventory of all Chrome installations across the organization to identify vulnerable systems
• Prioritize patching for systems with access to sensitive data or critical business functions

Patch Information

Google has released Chrome version 142.0.7444.166 which addresses this vulnerability. The update is available for Windows, macOS, and Linux platforms. Organizations should reference the official Google Chrome Desktop Update for complete release notes and additional security fixes included in this update.

Administrators can deploy updates through Chrome's built-in update mechanism or through enterprise software management tools. For managed Chrome deployments, administrators should use their existing update policies to push the patched version to all endpoints.

Workarounds

• Implement web content filtering to block access to known malicious or untrusted websites
• Consider using site isolation and strict site per-process settings in Chrome enterprise policies
• Deploy network-level protections that can identify and block exploit traffic patterns
• Educate users about phishing risks and the importance of avoiding suspicious links until patches are applied

# Configuration example - Verify Chrome version on Linux/macOS
google-chrome --version
# Expected output: Google Chrome 142.0.7444.166 or higher

# For Windows PowerShell - Check Chrome version
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.FileVersion
# Expected output: 142.0.7444.166 or higher