CVE-2025-3619: Google Chrome Buffer Overflow Vulnerability

CVE-2025-3619 is a critical heap buffer overflow vulnerability in Google Chrome's Codecs component on Windows that enables remote attackers to exploit heap corruption through malicious HTML pages. This article covers technical details, affected versions, impact assessment, and mitigation strategies.

CVE-2025-3619 Overview

Heap buffer overflow in Codecs in Google Chrome on Windows prior to 135.0.7049.95 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)

Critical Impact
This vulnerability could allow a remote attacker to execute arbitrary code, compromising system integrity and confidentiality.

Affected Products

Google Chrome
Microsoft Windows

Discovery Timeline

2025-04-16T21:15:47.920 - CVE CVE-2025-3619 published to NVD
2025-07-15T18:20:55.463 - Last updated in NVD database

Technical Details for CVE-2025-3619

Vulnerability Analysis

This vulnerability is a heap buffer overflow in the Codecs component of Google Chrome. It occurs due to improper handling of memory allocation during processing of HTML5 content. This flaw allows for memory corruption, potentially leading to arbitrary code execution.

Root Cause

The root cause of CVE-2025-3619 is improper boundary checks when handling codec memory operations, resulting in overflow conditions.

Attack Vector

This vulnerability can be exploited over the network, requiring the user to access a malicious HTML page.

cpp

// Example exploitation code (sanitized)
void processCodecData(char *input) {
    char buffer[256];
    strcpy(buffer, input); // Vulnerable to overflow
}

Detection Methods for CVE-2025-3619

Indicators of Compromise

Unusual spikes in Chrome process memory
Unexpected application crashes
Network calls to suspicious or unknown domains

Detection Strategies

Utilize behavior-based threat detection capabilities. SentinelOne products can detect anomalous memory access patterns and execution paths indicative of buffer overflow exploits.

Monitoring Recommendations

Implement continuous monitoring of process memory usage statistics
Alert on browser crashes and restarts to assess potential exploit attempts

How to Mitigate CVE-2025-3619

Immediate Actions Required

Update Google Chrome to the latest version
Restrict network access to untrusted domains
Deploy security solutions capable of blocking detected exploit attempts

Patch Information

Refer to the official Google Chrome advisory for patch details and apply updates as recommended.

Workarounds

If immediate patch application is not possible, limit web access to sites deemed necessary for business operations and consider disabling unnecessary browser plugins or extensions.

bash

# Configuration example
echo '127.0.0.1 suspiciousdomain.com' >> /etc/hosts