After being deprecated for several years, Security Enhanced Linux "SELinux" beginning with the Linux 6.4 kernel can no longer be run-time disabled. . For a while now SELinux deprecated run-time disabling for turning off SELinux via its config file or sysfs. By getting rid of the run-time disabling support, SELinux developers can make various improvements currently blocked by this code. Those wishing to disable SELinux support can still do so via the selinux=0 boot time option or when building the Linux kernel toggling the "CONFIG_SECURITY_SELINUX_DISABLE" Kconfig switch. The SELinux run-time disabling removal is made as part of this pull request pending for the newly-opened Linux 6.4 merge window. The link for this article located at Phoronix is no longer available. . The removal of run-time disabling for SELinux in Linux 6.4 impacts security protocols significantly, requiring admins to adapt their strategies for compliance.. SELinux Enhancements, Linux Kernel Changes, Security Features, Runtime Support. . LinuxSecurity.com Team
With the release of Fedora 34, the popular Linux distro aims to further increase security by removing support for the disabling of SELinux at run-time. . Currently on Fedora the Security Enhanced Linux (SELinux) functionality that's there by default can be disabled at run-time via the /etc/selinux/config but moving forward with Fedora 34 they are looking at removing that support and focusing just on disabling via selinux=0 at the kernel boot time in order to provide greater security. At present on Fedora, those wanting to forego the security safeguards can either pass selinux=0 as the kernel command line option to disable the support at boot time or by disabling it within the /etc/selinux/config file that in turn disables the support at run-time. The link for this article located at Phoronix is no longer available. . Ubuntu 22.04 boosts security with tighter firewall rules, fortifying system integrity.. Fedora 34, SELinux, Linux Security, Security Enhancement. . LinuxSecurity.com Team
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