In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix reparse buffer bounds in cifs query reparse point()

In cifs query reparse point(), the start >= end check before casting to struct reparse data buffer * only ensures the start pointer is within the response. It fails to verify that there is enough space remaining for the fixed 8-byte header of the structure.

If a server provides a DataOffset that leaves less than 8 bytes remaining, the check passes, but subsequent reads of ReparseTag and ReparseDataLength will occur out-of-bounds.

Fix this by ensuring the remaining space is at least the size of the reparse data buffer structure before accessing its fields.