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VERIFIED, mkbootdisk brought genisoimage package in yum

# mkbootdisk --iso --device ./boot.iso `uname -r`; echo $?; test -f boot.iso && echo OK
>0
>OK

#rpm -qR mkbootdisk | grep genisoimage
>genisoimage


mkbootdisk-1.5.5-10.el7.x86_64
genisoimage-1.1.11-20.el7.x86_64

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.