Introduction
Remote attackers could achieve heap corruption and potentially arbitrary code execution in billions of Chrome browsers simply by luring users to a malicious web page. The integer overflow vulnerability tracked as CVE-2025-10891 in Google Chrome's V8 JavaScript engine highlights the ongoing risk posed by memory safety flaws in widely deployed browser runtimes.
Technical Information
CVE-2025-10891 is an integer overflow vulnerability in the V8 JavaScript engine, which underpins Google Chrome and other Chromium-based browsers. The flaw arises when arithmetic operations on user-supplied input exceed the maximum value that the underlying integer type can represent. This overflow can cause calculations to wrap around, leading to incorrect values being used in memory allocation or array indexing.
In the context of V8, such an overflow may corrupt heap memory structures if, for example, an attacker-controlled value is used to calculate the size of a memory allocation or an array index. By embedding specially crafted JavaScript in an HTML page, a remote attacker can trigger this overflow. Successful exploitation can result in heap corruption, which may be leveraged to execute arbitrary code within the context of the browser process.
The vulnerability was discovered by Google's Big Sleep AI system, which systematically analyzes large codebases for security flaws. The root cause is the lack of comprehensive bounds checking on certain arithmetic operations in V8. The vulnerability was addressed by adding strict bounds checks to these operations, preventing values from exceeding their intended limits.
No public code snippets or exploit samples have been released as of this writing.
Patch Information
In the latest Chrome update (version 140.0.7339.207/.208), Google has addressed three significant security vulnerabilities within the V8 JavaScript engine:
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Side-Channel Information Leakage (CVE-2025-10890): This flaw allowed attackers to infer sensitive information through side-channel attacks. The patch mitigates this by implementing stricter isolation between processes, ensuring that data leakage through shared resources is prevented.
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Integer Overflow (CVE-2025-10891): An integer overflow in V8 could lead to memory corruption and potential code execution. The fix involves adding comprehensive bounds checking to arithmetic operations, preventing values from exceeding their intended limits.
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Integer Overflow (CVE-2025-10892): Similar to the previous issue, this vulnerability was another instance of integer overflow within V8. The resolution includes enhanced validation of input data and the implementation of safe integer handling practices to avert overflow conditions.
These patches collectively enhance Chrome's security by fortifying the V8 engine against specific attack vectors, thereby safeguarding users from potential exploits.
Patch source: Google Chrome Release Blog
Affected Systems and Versions
- Google Chrome for Windows and Mac: All versions prior to 140.0.7339.207 and 140.0.7339.208
- Google Chrome for Linux: All versions prior to 140.0.7339.207
- Only Chrome versions before these releases are vulnerable. Chrome 140.0.7339.207 and later are not affected.
Vendor Security History
Google Chrome's V8 engine has been the subject of multiple high-severity vulnerabilities in the past, particularly in the areas of memory safety such as type confusion, use-after-free, and integer overflow. Google has a strong track record of rapid vulnerability response, often releasing patches within days of discovery. The integration of AI-driven research through Big Sleep and the established work of Project Zero reflect a mature and proactive security posture. Previous similar vulnerabilities have also been addressed quickly, minimizing exposure windows for users.
References
- NVD Entry for CVE-2025-10891
- Official CVE Entry
- Google Chrome Release Blog
- Chromium Issue Tracker
- SecurityOnline.info: Google Chrome patches three high-severity flaws in V8 engine
- GBHackers: Chrome High Severity Flaws
- Malware News: Google Chrome Security Advisory
- Cybersecurity Help: Advisory
- Cybersecurity Help: Vulnerability Details