CVE-2023-6881 fs: fuse: buffer overflow vulnerability in the Zephyr FS

Possible buffer overflow in ismountpoint...

Stack overflow

FS: Buffer Overflow when enabling Long File Names in FATFS and calling fsstat. Zephyr versions = v1.14.2, = v2.3.0 contain Stack-based Buffer Overflow CWE-121. For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7fhv-rgxr-x56h...