GRUB2 Bootloader Normal Module Use-After-Free Vulnerability

A use-after-free vulnerability has been identified in the GRUB2 bootloader's normal module. This issue arises because the normal_exit command is not properly unregistered when the module is unloaded. An attacker can exploit this vulnerability by invoking the command after the module has been removed, leading to a system crash or potential unauthorized access to previously freed memory. Such exploitation could disrupt system stability or allow for unauthorized code execution.

Impact

Exploitation of this vulnerability can cause a system crash or unauthorized access to memory, potentially leading to exploitation of other vulnerabilities or execution of arbitrary code.