Kernel Debugger Vulnerability in Debian

CVE-2022-21499

Summary

This vulnerability allows unauthorized read and write access to kernel memory through the KGDB and KDB interfaces. Attackers with access to the system's serial port can exploit this vulnerability by triggering the kernel debugger, which may not adhere to the lockdown restrictions. This poses a significant threat to the confidentiality, integrity, and availability of the system as it enables potential manipulation or exposure of sensitive kernel memory data.

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