Vupen Security reports that it has officially “pwned” Google Chrome’s sandbox. This vulnerability is critical for Chrome. A sandbox is security mechanism used to run an application in a restricted environment. If an attacker is able to exploit the browser in a way that lets him run arbitrary code on the machine, the sandbox would help prevent this code from causing damage to the system. The sandbox would also prevent this exploit from modifying and even reading your files or any information on the system.
Source: https://thehackernews.com/2012/03/yet-another-google-chrome-sandbox.html