<p>➀ Io_uring was introduced in 2019 to improve the efficiency and flexibility of input and output operations on Linux, but it also created critical blind spots for Linux security tools.</p><p>➁ Security researchers have discovered that io_uring operations can completely evade conventional system call monitoring, leading to undetectable activities.</p><p>➂ A rootkit called Curing was built to exploit this vulnerability, which can execute commands, read files, and interact with the network without detectable system calls.</p>