The moxa char driver is missing a CAP_SYS_RAWIO check which could allow a local
user the ability to do things like replace the firmware. This is already fixed
in 2.4-bk and in 2.6.10-ac7 from Alan Cox (although it's ommitted from 2.6.10-ac10).
There is a rumour that moxa doesn't work with 2.6 at all, so it may not affect
RHEL4, please let us know if this is the case.
config-generic:# CONFIG_MOXA_INTELLIO is not set
config-generic:# CONFIG_MOXA_SMARTIO is not set