CVE-2025-10891 Overview
CVE-2025-10891 is an integer overflow vulnerability in the V8 JavaScript engine used by Google Chrome. This vulnerability exists in versions prior to 140.0.7339.207 and allows remote attackers to potentially exploit heap corruption through a specially crafted HTML page. The vulnerability enables attackers to trigger memory corruption conditions that could lead to arbitrary code execution within the browser's renderer process.
Critical Impact
Remote attackers can exploit this integer overflow to corrupt heap memory, potentially achieving code execution when users visit a malicious webpage. This affects Google Chrome users across all major operating systems.
Affected Products
- Google Chrome prior to version 140.0.7339.207
- Affected on Apple macOS
- Affected on Linux
- Affected on Microsoft Windows
Discovery Timeline
- 2025-09-24 - CVE-2025-10891 published to NVD
- 2025-09-25 - Last updated in NVD database
Technical Details for CVE-2025-10891
Vulnerability Analysis
The vulnerability resides in the V8 JavaScript engine, which is the core component responsible for executing JavaScript code within Google Chrome. Integer overflow conditions occur when arithmetic operations produce values that exceed the maximum representable value for the data type, causing the value to wrap around. In the context of V8, this integer overflow can lead to incorrect memory allocation sizes or buffer boundary calculations.
When exploited, the integer overflow results in heap corruption. Heap corruption vulnerabilities are particularly dangerous because they can allow attackers to overwrite critical data structures in memory, potentially leading to arbitrary code execution. The attack requires user interaction—specifically, the victim must navigate to a malicious webpage containing the crafted HTML payload.
Root Cause
The root cause of this vulnerability is improper handling of integer arithmetic operations within V8's internal code paths. When processing certain JavaScript constructs or HTML elements, V8 performs calculations that can overflow under specific conditions. The lack of proper bounds checking or safe integer arithmetic allows the overflow to occur, resulting in an incorrectly sized memory allocation or buffer access that corrupts the heap.
Attack Vector
This vulnerability is exploitable remotely via the network. An attacker must host a malicious webpage containing specially crafted HTML content designed to trigger the integer overflow condition in V8. When a victim visits this page using a vulnerable version of Google Chrome, the crafted content causes the integer overflow, leading to heap corruption.
The attack flow typically involves:
- Attacker creates a malicious webpage with crafted HTML/JavaScript
- Victim is lured to visit the malicious page (via phishing, malvertising, or compromised legitimate sites)
- Chrome's V8 engine processes the malicious content
- Integer overflow triggers heap corruption
- Attacker potentially achieves code execution in the renderer process
The vulnerability mechanism involves integer arithmetic operations that result in heap corruption when processing malicious HTML content. For detailed technical information, refer to the Chromium Issue Tracker Entry.
Detection Methods for CVE-2025-10891
Indicators of Compromise
- Unexpected browser crashes or instability when visiting specific webpages
- Unusual memory consumption patterns in Chrome renderer processes
- Detection of crafted HTML pages with suspicious JavaScript or DOM manipulation
- Browser process crashes with heap corruption signatures in crash dumps
Detection Strategies
- Monitor for browser crash reports indicating heap corruption or memory access violations in V8
- Implement network-based detection for known exploit patterns targeting V8 integer overflow conditions
- Deploy endpoint detection solutions capable of identifying suspicious JavaScript execution patterns
- Analyze browser crash telemetry for signatures consistent with integer overflow exploitation
Monitoring Recommendations
- Enable Chrome's built-in crash reporting to identify potential exploitation attempts
- Monitor endpoint behavior for unusual Chrome process activity or child process spawning
- Review network traffic for indicators of drive-by download campaigns targeting browser vulnerabilities
- Maintain visibility into browser version deployments across the enterprise to identify vulnerable instances
How to Mitigate CVE-2025-10891
Immediate Actions Required
- Update Google Chrome to version 140.0.7339.207 or later immediately
- Enable automatic updates in Chrome to ensure timely patching of future vulnerabilities
- Consider implementing browser isolation technologies for high-risk browsing activities
- Educate users about the risks of visiting untrusted websites
Patch Information
Google has released a security update addressing this vulnerability in Chrome version 140.0.7339.207. The fix is available through Chrome's standard update mechanism. Organizations should prioritize deploying this update across all managed endpoints.
For official patch details, refer to the Google Chrome Update Announcement.
Workarounds
- If immediate patching is not possible, consider using alternative browsers temporarily
- Implement web content filtering to block access to known malicious domains
- Enable Chrome's Site Isolation feature to limit the impact of renderer process compromises
- Deploy browser extensions that restrict JavaScript execution on untrusted sites
# Verify Chrome version on Linux/macOS
google-chrome --version
# Force Chrome update check
# Navigate to: chrome://settings/help
# Chrome will automatically check for and install updates
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
