Linux Kernel NTFS3 Filesystem Memory Leak Vulnerability

A memory leak vulnerability has been identified in the Linux kernel's NTFS3 filesystem. The issue arises because the filesystem does not implement the 'invalidate_folio' method. As a result, when data is written to the filesystem and the filesystem is subsequently unmounted, the cached data is not properly freed, leading to a permanent memory leak.

Impact

Exploitation of this vulnerability causes a memory leak, where cached data is not released after the filesystem is unmounted, potentially leading to increased memory usage over time.