CVE-2025-7657
📋 TL;DR
This CVE describes a use-after-free vulnerability in WebRTC within Google Chrome that could allow remote attackers to exploit heap corruption. Attackers could potentially execute arbitrary code or cause browser crashes by tricking users into visiting a malicious webpage. All Chrome users on vulnerable 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 →⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Browser crashes, denial of service, or limited information disclosure from memory corruption.
If Mitigated
Browser sandboxing may contain the exploit to browser process only, preventing full system compromise.
🎯 Exploit Status
Use-after-free vulnerabilities typically require careful memory manipulation but are frequently exploited in the wild for Chrome vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 138.0.7204.157 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/07/stable-channel-update-for-desktop_15.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 patched version.
🔧 Temporary Workarounds
Disable WebRTC
allTemporarily disable WebRTC functionality to prevent exploitation
chrome://flags/#disable-webrtc
Set 'WebRTC' flag to 'Disabled'
Use Chrome Enterprise policies
allDeploy Chrome updates via enterprise management tools
Use Google Admin Console or GPO to force Chrome updates
🧯 If You Can't Patch
- Restrict browser usage to trusted websites only
- Implement network filtering to block malicious domains and suspicious JavaScript
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: If version is less than 138.0.7204.157, system is vulnerable.Check Version:
chrome://version/ or 'google-chrome --version' (Linux) or check in Chrome settingsVerify Fix Applied:
Confirm Chrome version is 138.0.7204.157 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with WebRTC-related stack traces
- Unexpected Chrome process termination
Network Indicators:
- Unusual WebRTC connections to external domains
- Suspicious JavaScript loading patterns
SIEM Query:
source="chrome_crash_reports" AND (process="chrome" OR process="renderer") AND message="*WebRTC*" OR "*use-after-free*"