curl: Use-After-Free in OpenSSL Keylog Callback via SSL_get_ex_data() in libcurl

Summary: A Use-After-Free UAF vulnerability exists in libcurl when the OpenSSL SSLCTXsetkeylogcallback is set. The callback may be invoked after the associated SSL object has been freed via SSLfree, leading to access to a dangling pointer and potential crash or information leak via SSLgetexdata...