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XCCDF
Guide to the Secure Configuration of Red Hat Enterprise Linux 7
System Settings
Kernel Configuration
Avoid speculative indirect branches in kernel
Avoid speculative indirect branches in kernel
An XCCDF Rule
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Avoid speculative indirect branches in kernel
Medium Severity
Compile kernel with the retpoline compiler options to guard against kernel-to-user data leaks by avoiding speculative indirect branches. Requires a compiler with -mindirect-branch=thunk-extern support for full protection. The kernel may run slower. The configuration that was used to build kernel is available at
/boot/config-*
. To check the configuration value for
CONFIG_RETPOLINE
, run the following command:
grep CONFIG_RETPOLINE /boot/config-*
For each kernel installed, a line with value "y" should be returned.