Linux Kernel fastrpc Buffer Copy Vulnerability Leading to Memory Issues

A vulnerability in the Linux kernel's fastrpc driver can cause memory issues by improperly calculating buffer page sizes for non-registered buffers. The driver copies these buffers and sends them to a remote subsystem, but the current implementation fails to account for offsets, potentially leading to out-of-bounds page sizes. This vulnerability has been addressed by adjusting the page size calculation to use offset-adjusted addresses instead of absolute ones.

Impact

The vulnerability could cause memory-related issues by allowing improper buffer sizes to be passed, potentially leading to out-of-bounds memory access.