Overview
CVE-2025-13630 is a high-severity vulnerability affecting Google Chrome’s V8 JavaScript engine. This vulnerability, classified as a type confusion, could be exploited by a remote attacker to cause heap corruption by enticing a user to visit a specially crafted HTML page. The vulnerability was addressed in Chrome version 143.0.7499.41 and later.
Technical Details
The root cause of CVE-2025-13630 lies in the V8 JavaScript engine’s handling of object types. A type confusion occurs when the engine incorrectly infers the type of an object, leading to incorrect memory operations. In this case, a specially crafted HTML page could trigger the type confusion, allowing an attacker to write data to arbitrary memory locations. This can lead to heap corruption, where critical program data structures are overwritten, potentially enabling the attacker to execute arbitrary code on the user’s system.
Specific details about the code location and the exact mechanism of the type confusion are often withheld to prevent further exploitation and reverse engineering of the vulnerability before users have a chance to update.
CVSS Analysis
At the time of publishing this article, the CVSS score for CVE-2025-13630 is not yet available (N/A). However, Chromium developers have marked this as a “High” severity issue. Once the CVSS score is published, we will update this section. A high severity suggests significant potential for exploitation and impact.
Possible Impact
The exploitation of CVE-2025-13630 can have severe consequences:
- Arbitrary Code Execution: Successful exploitation could allow a remote attacker to execute arbitrary code on the victim’s machine with the privileges of the Chrome process.
- Data Theft: An attacker could potentially steal sensitive information, such as cookies, passwords, and browsing history.
- System Compromise: In some cases, the attacker could escalate privileges and gain complete control over the affected system.
- Denial of Service: The heap corruption could cause Chrome to crash, leading to a denial-of-service condition.
Mitigation or Patch Steps
The primary mitigation step is to update Google Chrome to version 143.0.7499.41 or later. Chrome typically updates automatically, but users should manually check for updates to ensure they are running the latest version. Follow these steps:
- Open Google Chrome.
- Click on the three dots (menu icon) in the upper-right corner.
- Go to Help > About Google Chrome.
- Chrome will automatically check for updates and install them.
- Restart Chrome to apply the updates.
