CVE-2025-9478
📋 TL;DR
This critical vulnerability in Google Chrome's ANGLE graphics engine allows attackers to execute arbitrary code or cause system crashes by exploiting a use-after-free memory corruption flaw. Users who visit malicious websites with unpatched Chrome 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 crash, denial of service, or limited code execution in sandboxed context
If Mitigated
No impact if Chrome is updated or exploit attempts are blocked by security controls
🎯 Exploit Status
Use-after-free vulnerabilities in browser engines are commonly exploited. No public exploit code is known yet, but critical Chrome vulnerabilities are often targeted quickly.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 139.0.7258.154 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/08/stable-channel-update-for-desktop_26.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 update 4. Click 'Relaunch' to restart Chrome
🔧 Temporary Workarounds
Disable WebGL
allTemporarily disable WebGL which uses ANGLE, reducing attack surface
chrome://flags/#disable-webgl → Disable
chrome://flags/#disable-accelerated-2d-canvas → Disable
Enable Site Isolation
allEnhance sandboxing to limit impact if exploited
chrome://flags/#enable-site-per-process → Enable
🧯 If You Can't Patch
- Use browser extensions that block JavaScript execution on untrusted sites
- Implement network filtering to block known malicious domains and restrict web browsing
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in About Google Chrome page. If version is below 139.0.7258.154, system is vulnerable.Check Version:
chrome://version/ or 'google-chrome --version' on Linux/macOS terminalVerify Fix Applied:
Confirm Chrome version is 139.0.7258.154 or higher in About Google Chrome page.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with ANGLE-related modules
- Unexpected Chrome process termination
- High memory usage followed by crashes
Network Indicators:
- Requests to domains hosting WebGL/Canvas-heavy content
- Unusual outbound connections after visiting suspicious sites
SIEM Query:
source="chrome_crash_reports" AND (process="chrome.exe" OR process="Google Chrome") AND module="*angle*"