CVE-2026-7940 Google Chrome V8释放后使用漏洞

// Conceptual PoC for CVE-2026-7940 // This demonstrates the structure of a malicious extension that would trigger the UAF. // File: manifest.json /* { "manifest_version": 3, "name": "Exploit Demo", "version": "1.0", "background": { "service_worker": "exploit.js" } } */ // File: exploit.js // Triggering the Use-After-Free in V8 function triggerExploit() { // 1. Spray heap to groom memory let buffer = new ArrayBuffer(1024); let view = new Uint8Array(buffer); // 2. Create the object that will be freed prematurely let vulnerableObject = { data: "sensitive" }; // 3. Perform operations that trigger the UAF bug in V8 < 148.0.7778.96 // (Specific V8 internal logic goes here) // 4. Attempt to access the freed memory try { console.log(vulnerableObject.data); } catch (e) { // Failure or crash indicates potential corruption } } triggerExploit();