CVE-2025-12439
📋 TL;DR
This vulnerability in Google Chrome's App-Bound Encryption implementation on Windows allows a local attacker to read potentially sensitive information from Chrome's process memory by tricking a user into opening a malicious file. It affects Chrome users on Windows who haven't updated to version 142.0.7444.59 or later. The attacker must have local access to the system.
💻 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
An attacker could extract sensitive data like passwords, cookies, session tokens, or other confidential information stored in Chrome's memory, potentially leading to account compromise or data theft.
Likely Case
Local attackers with basic access could extract some memory contents, but the specific sensitive information obtained would depend on what Chrome was processing at the time.
If Mitigated
With proper patching, the vulnerability is completely eliminated. Without patching, limiting local access and user education about opening files reduces risk.
🎯 Exploit Status
Exploitation requires local access and user interaction (opening a malicious file). No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 142.0.7444.59 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/10/stable-channel-update-for-desktop_28.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.
🔧 Temporary Workarounds
Disable automatic file opening
allConfigure Chrome to ask before opening files to prevent automatic execution of malicious files
chrome://settings/content/automaticDownloads → Set to 'Ask when a site tries to download files automatically'
Use Chrome sandboxing
windowsEnsure Chrome sandbox is enabled to limit potential memory exposure
chrome://flags → Search for 'sandbox' → Ensure all sandbox settings are enabled
🧯 If You Can't Patch
- Restrict local access to sensitive systems and implement principle of least privilege
- Educate users about the risks of opening untrusted files and implement application whitelisting
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: Open Chrome → Click three-dot menu → Help → About Google Chrome. If version is below 142.0.7444.59, you are vulnerable.Check Version:
chrome://version/ (in Chrome address bar) or 'chrome --version' in command lineVerify Fix Applied:
After updating, verify Chrome version is 142.0.7444.59 or higher using the same About Google Chrome page.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns from Chrome process
- Multiple memory access violations in system logs
Network Indicators:
- None - this is a local exploitation vulnerability
SIEM Query:
Process creation events where chrome.exe accesses suspicious file locations OR Memory access violations from chrome.exe process