The Uptrack service was obviously proprietary, but the Ksplice software itself (everything to actually make and install the patches) was open source. There are

The Uptrack service was obviously proprietary, but the Ksplice software itself (everything to actually make and install the patches) was open source. There are plenty of mirrors on github: https://github.com/linux-kernel-live-patching/ksplice https://github.com/linux-kernel-live-patching/ksplice But there's also kgraft and kpatch.