Buffer Overrun in Linux Kernel Affecting Xen Netback Functionality

CVE-2023-53502

What is CVE-2023-53502?

A recently identified vulnerability in the Linux kernel affects the Xen Netback component, allowing for a potential buffer overrun triggered by specific packet configurations. When a guest system sends a uniquely crafted packet with a length meeting certain criteria, it can cause an underflow in slot calculations. This error results in an improper termination condition during packet processing, ultimately leading to memory corruption. The vulnerability's resolution includes adjustments to the handling of additional fragment overflow slots, reinforcing the integrity of the network operations within virtualized environments.

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