CVE-2025-14766
📋 TL;DR
This vulnerability allows remote attackers to exploit heap corruption through out-of-bounds read/write in Chrome's V8 JavaScript engine. Attackers can execute arbitrary code by tricking users into visiting malicious websites. All Chrome users prior to version 143.0.7499.147 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 →⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, allowing attackers to install malware, steal data, or create persistent backdoors.
Likely Case
Browser compromise leading to session hijacking, credential theft, and installation of malicious extensions or cryptocurrency miners.
If Mitigated
Limited impact with browser sandboxing and exploit mitigations, potentially resulting in browser crashes or limited data exposure.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious site) but no authentication. V8 engine vulnerabilities are frequently exploited in the wild.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 143.0.7499.147 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/12/stable-channel-update-for-desktop_16.html
Restart Required: Yes
Instructions:
1. Open Chrome menu > Help > About Google Chrome. 2. Chrome will automatically check for updates. 3. Click 'Relaunch' when update is available. 4. Verify version is 143.0.7499.147 or higher.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents exploitation by disabling JavaScript execution in Chrome
chrome://settings/content/javascript > Block
Use Site Isolation
allEnforces process isolation between websites to limit impact
chrome://flags/#site-isolation-trial-opt-out > Disabled
🧯 If You Can't Patch
- Use alternative browsers until Chrome can be updated
- Implement network filtering to block known malicious domains and restrict web browsing
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in menu > Help > About Google Chrome. If version is below 143.0.7499.147, system is vulnerable.Check Version:
google-chrome --versionVerify Fix Applied:
Confirm Chrome version is 143.0.7499.147 or higher in About Google Chrome page.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports
- Unexpected process termination
- Memory access violation errors in system logs
Network Indicators:
- Connections to suspicious domains with JavaScript payloads
- Unusual outbound traffic from Chrome processes
SIEM Query:
source="chrome" AND (event_type="crash" OR message="access violation" OR message="out of bounds")