CVE-2026-109411 Samba: access control bypass via vfs_ceph_rgw case-insensitive open

An access control bypass flaw was found in Samba's vfscephrgw module in it's openat function. An authenticated user can bypass access controls to read or overwrite restricted files on shares configured with the experimental vfscephrgw module. When a client requests an existing file using mismatch...