Linux Kernel Vulnerability Affecting io_uring Implementation by Linux Foundation

CVE-2024-58000

Summary

A vulnerability in the Linux kernel's io_uring implementation allows for potential exploitation through speculative execution. By specifying an offset into a pre-mapped memory region, attackers could manipulate arguments passed during waiting loops, leading to unintended behavior. To mitigate this risk, the kernel uses the array_index_nospec() function to filter input correctly and prevent speculation exploits. Adjustments ensure that only safe, truncated regions of memory are referenced, thus enhancing the system's security posture.

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