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XCCDF
Guide to the Secure Configuration of Oracle Linux 8
System Settings
GRUB2 bootloader configuration
System Must Avoid Meltdown and Spectre Exploit Vulnerabilities in Modern Processors
System Must Avoid Meltdown and Spectre Exploit Vulnerabilities in Modern Processors
An XCCDF Rule
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System Must Avoid Meltdown and Spectre Exploit Vulnerabilities in Modern Processors
Medium Severity
Verify that Meltdown mitigations are not disabled:
$ sudo grubby --info=ALL | grep mitigations
The mitigations must not be set to "off".