CVE-2025-13223: Google Chrome V8 RCE Vulnerability

CVE-2025-13223 Overview

CVE-2025-13223 is a type confusion vulnerability affecting the V8 JavaScript engine in Google Chrome prior to version 142.0.7444.175. This vulnerability allows a remote attacker to potentially exploit heap corruption through a crafted HTML page, enabling arbitrary code execution on victim systems. The flaw exists in how V8 handles type operations, where incorrect type assumptions can lead to memory corruption scenarios.

Critical Impact

This vulnerability is actively exploited in the wild and has been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. Remote attackers can achieve code execution by luring victims to malicious web pages, making this a high-priority patching target for all organizations.

Affected Products

• Google Chrome versions prior to 142.0.7444.175 on Windows
• Google Chrome versions prior to 142.0.7444.175 on macOS
• Google Chrome versions prior to 142.0.7444.175 on Linux

Discovery Timeline

• 2025-11-17 - CVE-2025-13223 published to NVD
• 2025-12-02 - Last updated in NVD database

Technical Details for CVE-2025-13223

Vulnerability Analysis

This vulnerability is classified as CWE-843 (Access of Resource Using Incompatible Type, commonly known as Type Confusion). Type confusion vulnerabilities in JavaScript engines like V8 occur when the engine incorrectly assumes the type of an object during execution. When V8's optimizing compiler makes incorrect type assumptions, subsequent operations may treat memory as a different type than it actually is, leading to heap corruption.

The exploitation requires user interaction—specifically, a victim must navigate to a malicious webpage containing specially crafted JavaScript. Once triggered, the type confusion can corrupt heap memory, potentially allowing an attacker to gain control over program execution flow. Given that this vulnerability is listed in CISA's KEV catalog, active exploitation campaigns have been observed in the wild.

Root Cause

The root cause lies in V8's type inference and optimization mechanisms. V8 performs speculative optimizations based on observed types during JavaScript execution. When these type assumptions are violated through carefully crafted JavaScript code, the engine may access memory using an incompatible type, leading to heap corruption. This type confusion enables attackers to manipulate object properties or memory regions in unintended ways.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must host or inject malicious JavaScript code into a webpage that a victim visits. The crafted HTML page contains JavaScript designed to trigger the type confusion condition in V8. Upon execution, the vulnerability corrupts heap memory, which can be leveraged for arbitrary code execution within the browser's sandbox. Depending on additional vulnerabilities, sandbox escape may also be possible.

The attack flow typically involves:

1. Attacker crafts malicious JavaScript that manipulates V8's type system
2. Victim navigates to the malicious page (via phishing, malvertising, or compromised websites)
3. V8 engine processes the malicious code, triggering type confusion
4. Heap corruption occurs, enabling code execution within the renderer process

Detection Methods for CVE-2025-13223

Indicators of Compromise

• Unexpected Chrome renderer process crashes or high memory consumption patterns
• Network connections to suspicious domains known to host browser exploits
• Unusual JavaScript execution patterns in browser telemetry logs
• Chrome crash dumps indicating heap corruption in V8-related memory regions

Detection Strategies

• Monitor endpoint detection logs for Chrome processes exhibiting abnormal memory access patterns
• Deploy browser isolation solutions to contain potential exploitation attempts
• Analyze network traffic for connections to known malicious infrastructure associated with browser exploitation campaigns
• Review Chrome crash reports for signatures consistent with V8 type confusion exploitation

Monitoring Recommendations

• Enable Chrome's built-in security telemetry and crash reporting features
• Configure EDR solutions to alert on suspicious Chrome renderer process behavior
• Monitor for lateral movement attempts following potential browser compromise
• Implement DNS monitoring to detect connections to exploit kit infrastructure

How to Mitigate CVE-2025-13223

Immediate Actions Required

• Update Google Chrome to version 142.0.7444.175 or later immediately on all managed endpoints
• Prioritize patching given the vulnerability's inclusion in CISA's Known Exploited Vulnerabilities catalog
• Verify Chrome auto-update functionality is working correctly across the environment
• Consider temporarily restricting access to untrusted websites until patching is complete

Patch Information

Google has released a security update addressing this vulnerability in Chrome version 142.0.7444.175. The patch is available for Windows, macOS, and Linux platforms. Organizations should consult the Google Chrome Desktop Update for complete release details. Additional technical information is available via the Chromium Issue Tracker Entry. Given the active exploitation status, CISA has included this vulnerability in their Known Exploited Vulnerabilities Catalog.

Workarounds

• Enable Site Isolation in Chrome to limit the impact of renderer process compromises
• Configure browser policies to block JavaScript on untrusted sites where feasible
• Deploy browser isolation or sandboxing technologies to contain potential exploits
• Use enterprise browser management to enforce rapid updates across the organization

# Verify Chrome version via command line (Windows)
"C:\Program Files\Google\Chrome\Application\chrome.exe" --version

# Verify Chrome version via command line (macOS/Linux)
google-chrome --version

# Force Chrome update check via enterprise policy
# Set UpdateDefault policy to ensure automatic updates