Critical Google Chrome Vulnerability Enables Sandbox Escape — Patch Released
A high-severity vulnerability in Google Chrome, tracked as CVE-2025-2783, has been discovered, allowing attackers to escape the browser’s sandbox and potentially gain access to the host operating system. The flaw affects versions prior to 134.0.6998.142 on Windows, macOS, and Linux.
This vulnerability arises from a memory corruption issue in Chrome’s V8 JavaScript engine, which can be exploited to execute arbitrary code within the sandbox. Attackers can then chain this with a second flaw in the Inter-Process Communication (IPC) system to elevate privileges and escape the sandbox environment entirely.
The exploit was uncovered by SecureLayer7 during routine security assessments. Their research shows that successful exploitation requires minimal user interaction — often just visiting a malicious website — and can result in full system compromise, including data theft, malware installation, and persistent access.
The attack unfolds in two stages:
- Stage 1 — Arbitrary Code Execution via V8 Type Confusion:
function trigger() {
const arr = new Uint8Array(1024);
const obj = { x: 1.1 };
// Force JIT compilation
for (let i = 0; i < 100000; i++) {
obj.x = arr[i % 1024];
}
// Trigger type confusion
const vuln = Object.create(obj);
vuln.proto = arr;
return vuln.x.toString();
}
- This snippet creates a type confusion scenario, allowing memory manipulation and arbitrary code execution.
- Stage 2 — Sandbox Escape via IPC Flaw: The second stage leverages an IPC vulnerability to break out of the sandbox, bypassing Chrome’s layered security model.
Given Chrome’s 65% global browser market share, the implications of this vulnerability are widespread. Google has rated the issue as High severity and issued an emergency patch.
Users are urged to update their browsers to version 134.0.6998.177 or later by visiting chrome://settings/help and restarting the browser to ensure the patch is applied.
