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2025 x86_64 

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Safe-mode: OFF (not secure)

/etc/sysctl.d/   drwxr-xr-x
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Viewing file:     10-kernel-hardening.conf (1.2 KB)      -rw-r--r--

# These settings are specific to hardening the kernel itself from attack
# from userspace, rather than protecting userspace from other malicious
# userspace things.
#
#
# When an attacker is trying to exploit the local kernel, it is often
# helpful to be able to examine where in memory the kernel, modules,
# and data structures live. As such, kernel addresses should be treated
# as sensitive information.
#
# Many files and interfaces contain these addresses (e.g. /proc/kallsyms,
# /proc/modules, etc), and this setting can censor the addresses. A value
# of "0" allows all users to see the kernel addresses. A value of "1"
# limits visibility to the root user, and "2" blocks even the root user.
kernel.kptr_restrict = 1

# Access to the kernel log buffer can be especially useful for an attacker
# attempting to exploit the local kernel, as kernel addresses and detailed
# call traces are frequently found in kernel oops messages. Setting
# dmesg_restrict to "0" allows all users to view the kernel log buffer,
# and setting it to "1" restricts access to those with CAP_SYSLOG.
#
# dmesg_restrict defaults to 1 via CONFIG_SECURITY_DMESG_RESTRICT, only
# uncomment the following line to disable.
# kernel.dmesg_restrict = 0