CVE-2024-50260

Summary

CVE-2024-50260 is a recently identified vulnerability in the Linux kernel. This issue involves a NULL pointer dereference in the function sock_map_link_update_prog(), which can be triggered during a race condition in sock_map_link_detach(). Specifically, the mutex lock and unlock sequence in this function creates an opportunity for the map pointer to be set to NULL before the lookup operation, leading to the dereference. This vulnerability can potentially result in a kernel crash or even allow an attacker to gain unauthorized access. To mitigate this issue, the Linux kernel developers have introduced a NULL pointer check to prevent such dereferences. It's important to note that attempts to update a link while it is being released make no sense and should be avoided.

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