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Como no se mantienen bloqueos relevantes (en particular, la funci\u00f3n cred_guard_mutex) durante la llamada ptrace_may_access(), es posible que la tarea de destino especificada realice un syscall execve() con la ejecuci\u00f3n setuid anterior a que perf_event_alloc() realmente se conecte, permitiendo que un atacante omita la comprobaci\u00f3n ptrace_may_access() y la llamada perf_event_exit_task(current) que se realiza en install_exec_creds() durante las llamadas privilegiadas execve(). 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