{"description": "Randomizes the freelist order used on creating new pages.\nThis configuration is available from kernel 5.9, but may be available if backported by distros.\n\nThe configuration that was used to build kernel is available at <tt>/boot/config-*</tt>.\n    To check the configuration value for <tt>CONFIG_SLAB_FREELIST_RANDOM</tt>, run the following command:\n    <tt>grep CONFIG_SLAB_FREELIST_RANDOM /boot/config-*</tt>\n    \n    For each kernel installed, a line with value \"y\" should be returned.\n    ", "rationale": "This security feature reduces the predictability of the kernel slab allocator against heap overflows.", "severity": "medium", "references": {"anssi": ["R17"]}, "control_references": {"anssi": ["R17"]}, "components": [], "identifiers": {}, "ocil_clause": "the kernel was not built with the required value", "ocil": "To determine the config value the kernel was built with, run the following command:\n    <pre>$ grep CONFIG_SLAB_FREELIST_RANDOM /boot/config.*</pre>\n    \n    For each kernel installed, a line with value \"y\" should be returned.\n    ", "oval_external_content": null, "fixtext": "", "checktext": "", "vuldiscussion": "", "srg_requirement": "", "warnings": [{"general": "There is no remediation for this besides re-compiling the kernel with the appropriate value for the config."}], "conflicts": [], "requires": [], "policy_specific_content": {}, "platform": null, "platforms": [], "sce_metadata": {}, "inherited_platforms": ["system_with_kernel"], "cpe_platform_names": [], "inherited_cpe_platform_names": ["system_with_kernel"], "bash_conditional": null, "fixes": {}, "title": "Randomize slab freelist", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/system/kernel_build_config/kernel_config_slab_freelist_random/rule.yml", "template": {"name": "kernel_build_config", "vars": {"config": "CONFIG_SLAB_FREELIST_RANDOM", "value": "y"}, "backends": {}}}