Why does this mean I'm vulnerable? To what attack, exactly? My bash is already patched to not execute code in environment variables, so how is an attacker going

Why does this mean I'm vulnerable? To what attack, exactly? My bash is already patched to not execute code in environment variables, so how is an attacker going to get the above exploit to be running in my shell? Edit: Using the other test further up thread (which does actually make use of environment variables), my system says "not vulnerable". I think this test is not perfect.