CVE-2026-5904 Google Chrome V8释放后重用漏洞

// PoC Concept for CVE-2026-5904 // This code demonstrates the trigger logic within a malicious Chrome Extension context. // It attempts to manipulate V8 objects to cause a Use After Free condition. function triggerUAF() { // Step 1: Allocate an object in V8 heap let vulnerableObject = { data: new ArrayBuffer(1024), vptr: 0x41414141 }; // Step 2: Perform operations that lead to object being freed // Simulating a specific garbage collection or object lifecycle manipulation // specific to the vulnerable version of V8. someComplexV8Operation(vulnerableObject); // Step 3: Attempt to access the freed memory (Use After Free) // If successful, this dereferences a dangling pointer leading to heap corruption. try { console.log(vulnerableObject.vptr); // Corrupting the heap to potentially gain code execution } catch (e) { console.log("Exploit failed or patched."); } } // Simulated internal function representing the vulnerable path function someComplexV8Operation(obj) { // Hypothetical logic that frees 'obj' but leaves a reference // ... implementation depends on specific V8 internals ... } triggerUAF();