Linux Kernel Vulnerability in VMCI Leading to General Protection Fault

CVE-2023-53259

What is CVE-2023-53259?

A vulnerability in the Linux kernel's VMCI (Virtual Machine Communication Interface) can lead to a general protection fault (GPF) when the function get_user_pages_fast() is called. This issue arises from the potential for context->notify_page to return NULL, which fails to adequately handle errors, possibly leading to wild memory access. Proper validation checks are needed to determine if context->notify_page is NULL, allowing for safe error handling instead of causing system instability.

References