util-linux: util-linux: SUID mount(8) allows nosuid/noexec bypass via LIBMOUNT_FORCE_MOUNT2

A flaw was found in util-linux. The mount8 SUID binary does not sanitize the LIBMOUNTFORCEMOUNT2 environment variable before use. A local unprivileged user can set this variable to force mount8 to use the legacy two-step mount2 code path, which applies security restrictions such as nosuid and...