The code responsible for loading a suid-binary following a call to the execve syscall invalidates the task port after first swapping the new vm_map into the old task object leaving a short race window where we can manipulate the memory of the euid(0) process before the old task port is destroyed.
6be58b3f0fc092cb166e20a9e2e0ef99de307b957f1541a6ea0dd7a8f7ca8531
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