Overview
The cybersecurity landscape is littered with challenges and threats, and one such threat that has recently been identified is the high-severity vulnerability CVE-2025-10891. It is an integer overflow vulnerability that resides in the V8 engine used by Google Chrome. This vulnerability has the potential to be exploited by a remote attacker through a specifically crafted HTML page, leading to possible heap corruption.
Given the widespread use of Google Chrome, this vulnerability has the potential to affect millions of users globally. Its exploitation can result in system compromise or data leakage, posing serious risks to both personal and corporate data. Therefore, it is crucial to understand, detect, and mitigate this vulnerability promptly.
Vulnerability Summary
CVE ID: CVE-2025-10891
Severity: High (CVSS score: 8.8)
Attack Vector: Remote
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Google Chrome | Prior to 140.0.7339.207
How the Exploit Works
A remote attacker can exploit this vulnerability by enticing a user to visit a maliciously crafted HTML page. The integer overflow vulnerability in the V8 engine of Google Chrome can cause the memory allocation to wrap around and allocate less memory than required. Consequently, when the object writes data, it can write past the end of the buffer and corrupt the heap, which can lead to arbitrary code execution.
Conceptual Example Code
The following is a conceptual example of how an attacker might craft an HTML page to exploit this vulnerability. Note that this is a simplified pseudocode representation and the actual exploit would be more complex.
<html>
<head>
<script>
function exploitV8Overflow() {
var largeNumber = Math.pow(2, 31); // Integer overflow trigger
var arr = new Array(largeNumber); // Allocates less memory than needed
arr[largeNumber] = 'payload'; // Writes past the buffer, corrupting the heap
// further code to leverage the heap corruption for arbitrary code execution
}
</script>
</head>
<body onload="exploitV8Overflow()">
</body>
</html>Mitigation Guidance
The best mitigation for this vulnerability is to apply the patch released by the vendor. Google has released a newer version of Chrome that addresses this vulnerability. Users should ensure they keep their browser updated to the latest version at all times.
As a temporary mitigation, Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) can be used to detect and block exploit attempts. However, it is important to note that these are not full-proof solutions and the vulnerability still exists until the patch is applied.
Remember, the best defense against security vulnerabilities is to keep all systems and software up-to-date with the latest patches and updates.
