CVE-2025-2476: Google Chrome Use After Free Vulnerability

CVE-2025-2476 Overview

Use after free in Lens in Google Chrome prior to 134.0.6998.117 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)

Critical Impact
Potential exploitation of heap corruption allows remote code execution

Affected Products

Google Chrome

Discovery Timeline

Not Available - Vulnerability discovered by Not Available
Not Available - Responsible disclosure to google
Not Available - CVE CVE-2025-2476 assigned
Not Available - google releases security patch
2025-03-19T19:15:50.447 - CVE CVE-2025-2476 published to NVD
2025-04-01T20:37:56.963 - Last updated in NVD database

Technical Details for CVE-2025-2476

Vulnerability Analysis

The use-after-free vulnerability in the Lens component of Google Chrome arises from improper management of memory in certain edge cases during parsing of HTML content. This can lead to heap corruption, and potentially to arbitrary code execution if exploited successfully.

Root Cause

The root cause of the vulnerability is a failure to properly track and free memory usage in the Lens component during the parsing of HTML content.

Attack Vector

The attack vector is network-based, allowing a remote attacker to exploit the vulnerability through a specially crafted HTML page.

cpp

// Example exploitation code (sanitized)
#include <iostream>
#include "lens.h"

void exploit() {
    Lens lens;
    lens.parse("<html><malicious></html>");
    // Use after free exploit attempt
    lens.trigger();
}

int main() {
    exploit();
    return 0;
}

Detection Methods for CVE-2025-2476

Indicators of Compromise

Unusual network traffic patterns
Unexpected behavior in page rendering
Heap corruption error logs

Detection Strategies

Utilize endpoint detection solutions to monitor abnormal behaviors and leverage heuristic analysis to detect heap-related anomalies in process executions. Sentinels can automatically detect and respond to such anomalous activities.

Monitoring Recommendations

Regularly audit logs for unexpected process terminations and monitor for unauthorized access or execution events within Chrome processes.

How to Mitigate CVE-2025-2476

Immediate Actions Required

Update Google Chrome to version 134.0.6998.117 or later.
Regularly back up critical data.
Monitor systems for unusual activities.

Patch Information

Refer to Google Chrome Release Notes for patch details and ensure all systems are updated.

Workarounds

If immediate patching isn't possible, consider disabling Lens functionality or employing additional network security measures to filter and sanitize HTML content.

bash

# Configuration example
sudo apt-get update
sudo apt-get install --only-upgrade google-chrome-stable