Fix for Use-After-Free in get_info() in Linux netfilter

CVE-2024-50257

What is CVE-2024-50257?

A vulnerability within the Linux kernel's netfilter component has been identified, specifically concerning the ip6table_nat module. This issue arises during the concurrent execution of module unload operations and the get_info() function calls, leading to a scenario where a use-after-free condition occurs. The improper handling of reference counts can trigger a warning, highlighting the potential risks involved when modules are unloaded without adequately managing their state within the kernel's memory management system. This condition can lead to instability and unexpected behavior in systems relying on the affected kernel configuration, necessitating attention from system administrators to ensure software is updated and patched accordingly.

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