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kernelcare wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 overview 2 see also 3 references 4 external links toggle the table of contents kernelcare 1 language 한국어 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia live kernel patching service for linux kernelcare developer tuxcare release march 19 2014 12 years ago 2014 03 19 1 operating system linux type kernel extension license gnu gpl version 2 website kernelcare com kernelcare is a live kernel patching service that provides security patches and bugfixes for a range of popular linux kernels 2 that can be installed without rebooting the system 3 kernelcare software is a commercial product the first beta was introduced in march 2014 and it was commercially launched in may 2014 overview edit see also linux kernel live patching kernelcare agent resides on user s server it periodically checks in with kernelcare distribution servers if there are new patches available for the currently running kernel kernelcare agent downloads and applies those patches to the running kernel a kernelcare patch is a piece of code used to substitute vulnerable or buggy code in a kernel it can be an arbitrary code line modification or it can be a missing security check a set of functions or even modified data structures 3 the patch is compiled as usual but the generated code has additional information about all changed code pieces caused by original source code modification and information on how to apply these code pieces the resulting code modifications are safely applied to the running kernel a special kernelcare kernel module applies the patches it loads the patches into the kernel address space sets up the relocations i e fixes the references to the original kernel code and data and safely switches the execution path from the original code to updated code blocks the code ensures the patch is applied safely so the cpu doesn t execute the original code blocks at the same moment when switching to a new version 4 5 see also edit linux portal dynamic software updating a field of research focusing on upgrading programs while they are running kexec a method for loading a whole new kernel from a running system kgraft kpatch and ksplice other linux kernel live patching technologies developed by suse red hat and ksplice inc later acquired by oracle respectively references edit cloudlinux announces kernelcare com rebootless kernel update service pingzine com archived from the original on 29 june 2016 retrieved 29 august 2015 kernelcare promises linux security updates without the reboots the var guy archived from the original on 14 september 2016 retrieved 29 august 2015 1 2 kernelcare new no reboot linux patching system zdnet retrieved 29 august 2015 cloudlinux launches kuberdock public beta archived from the original on 17 august 2016 retrieved 29 august 2015 kernelcare verspricht patches ohne neustart pro linux retrieved 29 august 2015 external links edit official website v t e linux kernel organization kernel linux foundation linux mark institute linus s law tanenbaum torvalds debate tux sco disputes linaro gnu gpl v2 menuconfig supported computer architectures version history criticism support developers the linux programming interface kernel org lkml linux conferences users linux user group lug people werner almesberger h peter anvin jens axboe moshe bar suparna bhattacharya andries brouwer rémy card alan cox matthew garrett avi kivity con kolivas greg kroah hartman robert love david s miller ingo molnár andrew morton hans reiser rusty russell shuah khan linus torvalds theodore ts o stephen tweedie harald welte chris wright technical debugging criu ftrace kdump linux kernel oops systemtap bpf ebpf startup vmlinux system map dracut initrd initramfs abis linux standard base x32 abi apis kernel system call interface posix ioctl select open read close sync linux only futex epoll splice dnotify inotify readahead in kernel alsa crypto api io_uring drm kernfs memory barrier new api rcu video4linux iio userspace daemons file systems bpffs configfs devfs devpts debugfs fuse hugetlbfs pipefs procfs securityfs sockfs sysfs tmpfs systemd udev kmscon binfmt_misc wrapper libraries c standard library glibc uclibc bionic libhybris dietlibc eglibc klibc musl newlib libcgroup libdrm libalsa libevdev libusb liburing components kernel modules bluez cgroups console bcache device mapper dm cache dm crypt drm edac evdev kernel same page merging ksm lio framebuffer lvm kms driver netfilter netlink nftables network scheduler perf slub zram zswap process and i o schedulers brain fuck scheduler completely fair scheduler cfs earliest eligible virtual deadline first eevdf noop scheduler o n scheduler o 1 scheduler sched_deadline sched_fifo sched_rr security modules apparmor exec shield seccomp selinux smack tomoyo linux linux pam device drivers 802 11 graphics raw device initramfs kernelcare kexec kgraft kpatch ksplice variants mainline linux kernel linux libre high performance computing ink compute node linux slurm real time computing rtlinux rtai xenomai preempt_rt mmu less μclinux psxlinux virtualization hypervisor kvm xen os level virtualization linux vserver lguest lxc openvz other l4linux user mode linux mklinux colinux adoption range of use desktop embedded gaming thin client ltsp server lamp lyme lyce devices adopters list of linux adopters linux portal free and open source software portal category v t e operating systems general comparison forensic engineering history list timeline usage share user features comparison variants disk operating system distributed operating system embedded operating system hobbyist operating system just enough operating system mobile operating system network operating system object oriented operating system real time operating system supercomputer operating system kernel architectures exokernel hybrid microkernel monolithic multikernel vkernel rump kernel unikernel components device driver loadable kernel module user space and kernel space process management concepts computer multitasking cooperative preemptive context switch interrupt ipc process process control block pcb real time thread thread control block tcb time sharing scheduling algorithms fixed priority preemptive multilevel feedback queue round robin shortest job next memory management resource protection bus error general protection fault memory paging memory protection protection ring segmentation fault virtual memory storage access file systems boot loader defragmentation device file file attribute inode journal partition virtual file system virtual tape library supporting concepts api computer network hal live cd live usb shell cli user interface pxe retrieved from https en wikipedia org w index php title kernelcare oldid 1360386946 categories free security software programmed in c linux kernel live patching linux only free software software using the gnu general public license hidden categories articles with short description short description matches wikidata cs1 unfit url official website different in wikidata and wikipedia this page was last edited on 21 june 2026 at 04 51 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the 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