CVE-2025-8011: Google Chrome V8 RCE Vulnerability

CVE-2025-8011 Overview

CVE-2025-8011 is a Type Confusion vulnerability in the V8 JavaScript engine used by Google Chrome. This vulnerability exists in versions prior to 138.0.7204.168 and allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. The V8 engine is Chrome's high-performance JavaScript and WebAssembly engine, making this a critical attack surface for browser-based exploitation.

Critical Impact

Remote attackers can achieve heap corruption through a specially crafted HTML page, potentially leading to arbitrary code execution within the browser context. Successful exploitation could allow attackers to escape the browser sandbox and compromise the underlying system.

Affected Products

• Google Chrome versions prior to 138.0.7204.168
• Google Chrome on Microsoft Windows
• Google Chrome on Apple macOS
• Google Chrome on Linux

Discovery Timeline

• 2025-07-22 - CVE-2025-8011 published to NVD
• 2025-09-26 - Last updated in NVD database

Technical Details for CVE-2025-8011

Vulnerability Analysis

This Type Confusion vulnerability (CWE-843) occurs within V8, Chrome's JavaScript engine responsible for parsing and executing JavaScript code. Type confusion vulnerabilities arise when a program allocates or initializes a resource as one type but later accesses it using an incompatible type, leading to undefined behavior.

In the context of V8, the engine uses sophisticated optimization techniques including Just-In-Time (JIT) compilation to accelerate JavaScript execution. During these optimizations, V8 makes assumptions about object types to generate efficient machine code. When these type assumptions are violated or manipulated by an attacker through specially crafted JavaScript, the engine may misinterpret memory contents, treating data of one type as another.

This misinterpretation can lead to heap corruption, where memory structures are overwritten or accessed incorrectly. An attacker exploiting this vulnerability could potentially achieve arbitrary read/write primitives in the renderer process memory, which could be leveraged for further exploitation such as sandbox escape.

Root Cause

The root cause stems from improper type handling within the V8 JavaScript engine's type system. During JIT compilation and optimization phases, V8 performs speculative optimizations based on observed type patterns. The vulnerability occurs when these type guards are insufficient or can be bypassed, allowing an attacker to cause the engine to process an object with incorrect type assumptions.

This class of vulnerability is common in modern JavaScript engines due to the dynamic nature of JavaScript and the aggressive optimizations required for performance. The type confusion leads to memory corruption in the heap, which houses dynamically allocated JavaScript objects.

Attack Vector

The attack is network-based and requires user interaction—specifically, convincing a victim to navigate to a malicious webpage containing crafted HTML and JavaScript. The attack flow typically involves:

1. Attacker hosts a malicious webpage containing specially crafted JavaScript code
2. Victim navigates to the malicious page (via phishing, malvertising, or compromised legitimate sites)
3. The crafted JavaScript triggers the type confusion in V8
4. Heap corruption occurs, potentially allowing arbitrary code execution in the renderer process
5. Additional exploitation may be required to escape Chrome's sandbox

The vulnerability can be exploited through any vector that delivers HTML content to the browser, including drive-by downloads, malicious advertisements, or compromised websites.

Detection Methods for CVE-2025-8011

Indicators of Compromise

• Unusual Chrome renderer process crashes or stability issues
• Unexpected JavaScript execution patterns in browser logs
• Network traffic to known malicious domains hosting exploit kits
• Anomalous memory allocation patterns in Chrome processes

Detection Strategies

• Monitor for Chrome versions below 138.0.7204.168 across endpoints using endpoint detection and response (EDR) solutions
• Deploy network-based threat detection to identify exploit kit traffic patterns
• Enable Chrome's built-in crash reporting and monitor for V8-related crashes
• Utilize browser extension policies to restrict JavaScript execution on untrusted sites

Monitoring Recommendations

• Implement centralized logging for browser crash dumps and analyze for V8-related patterns
• Configure SentinelOne agents to monitor Chrome process behavior for anomalous heap operations
• Track browser version compliance across the organization using asset inventory tools
• Monitor for child process spawning from Chrome renderer processes which may indicate sandbox escape attempts

How to Mitigate CVE-2025-8011

Immediate Actions Required

• Update Google Chrome to version 138.0.7204.168 or later immediately on all systems
• Enable automatic updates for Chrome to ensure timely patch deployment
• Consider restricting access to untrusted websites until patches are deployed
• Implement browser isolation solutions for high-risk users or environments

Patch Information

Google has released Chrome version 138.0.7204.168 which addresses this vulnerability. The patch is available through Chrome's standard update mechanism. Organizations should verify patch deployment across all managed endpoints.

For detailed patch information, refer to the Google Chrome Stable Update announcement. Additional technical details can be found in the Chromium Issue Tracker Entry.

Workarounds

• Enable Site Isolation in Chrome to provide additional process-level protection between sites
• Consider using Chrome's Enterprise policies to restrict JavaScript execution on untrusted domains
• Deploy web content filtering to block known malicious sites and exploit kit infrastructure
• Implement browser virtualization or containerization for users who frequently access untrusted content

# Configuration example - Enable Site Isolation via Chrome Enterprise Policy
# For Linux/macOS systems, create or modify the managed preferences:
# /etc/opt/chrome/policies/managed/site_isolation.json

{
  "SitePerProcess": true,
  "IsolateOrigins": "example.com,sensitive-site.com"
}

# Verify Chrome version via command line
google-chrome --version
# Expected output: Google Chrome 138.0.7204.168 or higher