CVE-2026-5871 Chrome V8类型混淆致代码执行漏洞

// Conceptual PoC for V8 Type Confusion // Triggering type confusion in V8 requires specific JIT optimization patterns function main() { // Step 1: Prepare an object with a specific map let leak_obj = {a: 1, b: 2}; // Step 2: Trigger TurboFan optimization by running the function hot // The compiler assumes 'leak_obj' always has the same structure for (let i = 0; i < 10000; i++) { if (leak_obj.a === 1) {} } // Step 3: Modify the object structure (Map Transition) // This changes the object's type without the optimized code knowing leak_obj.c = 3.14159; // Step 4: Access the object with the now-incorrect type assumption // This can lead to treating a double value as a pointer (Type Confusion) // In a real exploit, this would lead to memory corruption / RCE console.log(leak_obj.a); } main();