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05/26/2025 10:13:33 PM
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10-console-messages.conf
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02/27/2020 05:52:07 AM
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10-ipv6-privacy.conf
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10-kernel-hardening.conf
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10-link-restrictions.conf
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10-magic-sysrq.conf
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10-network-security.conf
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10-ptrace.conf
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10-zeropage.conf
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README.sysctl
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Editing: 10-zeropage.conf
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# Protect the zero page of memory from userspace mmap to prevent kernel # NULL-dereference attacks against potential future kernel security # vulnerabilities. (Added in kernel 2.6.23.) # # While this default is built into the Ubuntu kernel, there is no way to # restore the kernel default if the value is changed during runtime; for # example via package removal (e.g. wine, dosemu). Therefore, this value # is reset to the secure default each time the sysctl values are loaded. vm.mmap_min_addr = 65536