V3.4.0 Exploit — Zend Engine

Triggering errors during string concatenation to free memory that the engine still believes is active. How to Protect Your Stack

A typical PoC for this version uses a custom error handler to force a crash or memory corruption: : A large string is initialized. zend engine v3.4.0 exploit

(e.g., PHP 7.4.x) rather than the Zend Engine version number. Triggering errors during string concatenation to free memory