CVE-2025-10891
📋 TL;DR
An integer overflow vulnerability in Chrome's V8 JavaScript engine allows remote attackers to trigger heap corruption via malicious HTML pages. This affects all users running vulnerable versions of Google Chrome, potentially leading to arbitrary code execution. The vulnerability is remotely exploitable without user interaction beyond visiting a malicious website.
💻 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
Full remote code execution with the privileges of the Chrome process, potentially leading to system compromise, data theft, or ransomware deployment.
Likely Case
Browser crash (denial of service) or limited code execution within Chrome's sandbox, potentially enabling data exfiltration or further exploitation.
If Mitigated
No impact if Chrome is fully patched or if exploit attempts are blocked by network/web security controls.
🎯 Exploit Status
Exploitation requires bypassing Chrome's sandbox and other security mitigations, but the vulnerability itself is remotely triggerable without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 140.0.7339.207 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop_23.html
Restart Required: Yes
Instructions:
1. Open Chrome
2. Click the three-dot menu → Help → About Google Chrome
3. Chrome will automatically check for and install updates
4. Click 'Relaunch' to restart Chrome with the update applied
🔧 Temporary Workarounds
Disable JavaScript
allPrevents exploitation by disabling JavaScript execution, but breaks most website functionality.
Use Site Isolation
allEnsure Chrome's Site Isolation feature is enabled to limit impact of potential exploitation.
🧯 If You Can't Patch
- Restrict access to untrusted websites using web filtering/proxy solutions
- Implement application control to block Chrome execution until patched
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: If version is less than 140.0.7339.207, the system is vulnerable.Check Version:
chrome://version/ (in Chrome address bar) or 'google-chrome --version' (command line)Verify Fix Applied:
Confirm Chrome version is 140.0.7339.207 or higher after applying update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with V8-related errors
- Unexpected Chrome process termination
Network Indicators:
- Requests to known malicious domains hosting exploit code
- Unusual outbound connections from Chrome processes
SIEM Query:
source="chrome" AND (event_type="crash" OR message="*V8*" OR message="*heap corruption*")