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XCCDF
Guide to the Secure Configuration of Red Hat Enterprise Linux CoreOS 4
System Settings
Kernel Configuration
Disable kexec system call
Disable kexec system call
An XCCDF Rule
Details
Profiles
Prose
Disable kexec system call
Low Severity
kexec
is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot but it is independent of the system firmware. And like a reboot you can start any kernel with it, not just Linux. The configuration that was used to build kernel is available at
/boot/config-*
. To check the configuration value for
CONFIG_KEXEC
, run the following command:
grep CONFIG_KEXEC /boot/config-*
Configs with value 'n' are not explicitly set in the file, so either commented lines or no lines should be returned.