CVE-2023-21163

Summary

CVE-2023-21163 is a newly discovered vulnerability affecting the PMR (Particular Memory Region) subsystem in the Linux kernel. The issue resides in the PMR_ReadBytes function within pmr.c, where a use-after-free condition occurs, leading to a potential arbitrary code execution. This vulnerability allows an attacker to escalate privileges locally in the kernel without requiring any additional execution privileges. Importantly, user interaction is not necessary for exploitation.

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