In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak when using fscache If we hit the 'index == next_cached' case, we leak a refcount on the struct page. Fix this by using readahead_folio() which takes care of the refcount for you.
https://git.kernel.org/stable/c/c6f62f81b488d00afaa86bae26c6ce9ab12c709e
https://git.kernel.org/stable/c/ae497726cd090673a4d20ac725ccc2de8067a7a5
https://git.kernel.org/stable/c/7105b4047481bc2950fb767cff328d8b75292c0f