CVE-2025-6554
📋 TL;DR
This vulnerability is a type confusion flaw in Chrome's V8 JavaScript engine that allows attackers to perform arbitrary memory read/write operations. Attackers can exploit it by tricking users into visiting a malicious webpage. All Chrome users on affected versions are vulnerable.
💻 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
Full system compromise including remote code execution, data theft, and complete browser control
Likely Case
Arbitrary code execution within browser context leading to session hijacking, credential theft, and malware installation
If Mitigated
Limited impact due to Chrome sandboxing, but still significant browser compromise
🎯 Exploit Status
CISA has added this to their Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 138.0.7204.96 or later
Vendor Advisory: https://chromereleases.googleblog.com/2025/06/stable-channel-update-for-desktop_30.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 with the update
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript to prevent exploitation
chrome://settings/content/javascript → Block
Use Site Isolation
allEnsure site isolation is enabled for additional protection
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 malicious websites and restrict browser usage
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in About Google Chrome pageCheck Version:
chrome://version/Verify Fix Applied:
Verify Chrome version is 138.0.7204.96 or higher📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with V8-related errors
- Unusual process spawning from Chrome
Network Indicators:
- Connections to suspicious domains from Chrome processes
- Unusual outbound traffic patterns
SIEM Query:
process_name:chrome.exe AND (event_id:1000 OR event_id:1001) AND description:*V8*