Tiny Core Linux 5.2 has an updated BusyBox plus a handful of other changes. For those unfamiliar with Tiny Core Linux, the project site explains, "It starts with a recent Linux kernel, vmlinuz 3.0, and a 5MB core.gz. MicroCore 8MB is simply the kernel + core.gz - this is the foundation for user created desktops, servers, or appliances. TinyCore is simply the kernel + core.gz + Xvesa.tcz|Xorg.tcz + Xprogs +fltk-1.10.tcz + (user's choice of Window Manager) + wbar.tcz TinyCore becomes simply an example of what the Core Project can produce, an 12MB FLTK/FLWM desktop. CorePlus ofers a simple way to get started using the Core philosophy with its included community packaged extensions enabling easy embedded frugal or pendrive installation of the user's choice of supported desktop, while maintaining the Core principal of mounted extensions with full package management."
For additional details on Tiny Core 5.2, check out the release announcement.