CVE-2025-13720
📋 TL;DR
This vulnerability allows a remote attacker who has already compromised Chrome's renderer process to exploit heap corruption through a bad cast in the Loader component. Attackers could potentially execute arbitrary code or cause browser crashes. All users running vulnerable Chrome versions are affected.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 What is this software?
Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
Learn more about Chrome →Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
Learn more about Chrome →⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or malware installation.
Likely Case
Browser crash (denial of service) or limited sandbox escape within the browser process.
If Mitigated
Browser crash with no further impact due to Chrome's sandboxing and process isolation.
🎯 Exploit Status
Requires chaining with another vulnerability to compromise renderer process first.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 143.0.7499.41 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/12/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click three-dot menu → Help → About Google Chrome. 3. Chrome will automatically check for and install updates. 4. Click 'Relaunch' to restart Chrome.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents malicious HTML pages from executing JavaScript that could trigger the vulnerability
chrome://settings/content/javascript → Block
Use Site Isolation
allEnsure Chrome's Site Isolation feature is enabled for additional process separation
chrome://flags/#site-isolation-trial-opt-out → Disabled
🧯 If You Can't Patch
- Use alternative browser temporarily
- Implement network filtering to block suspicious HTML content
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in About Google Chrome pageCheck Version:
google-chrome --version (Linux) or open chrome://versionVerify Fix Applied:
Verify Chrome version is 143.0.7499.41 or higher📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports
- Renderer process termination logs
- Unexpected process spawns from Chrome
Network Indicators:
- Requests to known exploit hosting domains
- Unusual HTML/JavaScript payload patterns
SIEM Query:
source="chrome_crash_reports" AND (process="renderer" OR error="bad_cast")