CVE-2025-11215
📋 TL;DR
This CVE describes an off-by-one error in Chrome's V8 JavaScript engine that allows a remote attacker to read memory outside the intended buffer boundaries via a malicious HTML page. All users running vulnerable versions of Chrome are affected when visiting compromised or malicious websites. The vulnerability enables information disclosure but not arbitrary code execution.
💻 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 read sensitive data from Chrome's memory, potentially exposing authentication tokens, session cookies, or other confidential information from the browser process.
Likely Case
Information disclosure of random memory contents from the Chrome process, which could include fragments of sensitive data but requires specific targeting to be useful.
If Mitigated
With proper controls like updated browsers and security software, the impact is limited to potential information leakage without code execution.
🎯 Exploit Status
Exploitation requires user interaction (visiting a malicious page) but no authentication. The off-by-one nature makes reliable exploitation challenging.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 141.0.7390.54
Vendor Advisory: https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop_30.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 patched version.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents exploitation by disabling JavaScript execution, which breaks most web functionality.
Use Site Isolation
allEnables Chrome's Site Isolation feature to limit cross-site data exposure.
🧯 If You Can't Patch
- Restrict browsing to trusted websites only
- Implement network filtering to block malicious domains
🔍 How to Verify
Check if Vulnerable:
Check Chrome version via chrome://version/ and compare with vulnerable range (anything below 141.0.7390.54).Check Version:
On command line: google-chrome --version (Linux) or navigate to chrome://version/Verify Fix Applied:
Confirm Chrome version is 141.0.7390.54 or higher via chrome://version/.📡 Detection & Monitoring
Log Indicators:
- Chrome crash reports with V8-related errors
- Unusual memory access patterns in system logs
Network Indicators:
- Requests to known malicious domains hosting exploit code
- Unusual outbound traffic from Chrome processes
SIEM Query:
source="chrome_logs" AND (event="crash" OR event="exception") AND process="chrome" AND module="v8"