KernelCare:
Try live kernel
patching free KernelCare: Try live kernel
patching free

Automatic, rebootless security patching for your Linux servers.

No reboots, no maintenance windows, no downtime for your customers.
Works on CloudLinux, AlmaLinux, RHEL, Ubuntu, Debian, Rocky and more.

OR SIGN UP FOR A TRIAL

What's Included
With Your Trial

Everything below is active for the full 2-week trial.

Rebootless kernel patchingAutomatic security fixes with no reboots, maintenance windows, or downtime.
Updates every 4 hoursThe agent automatically checks for and applies in-memory patches with no process interruption.
Instant rollbackRevert patches instantly without rebooting.
Broad OS supportStandardized patching across CloudLinux, AlmaLinux, RHEL, Ubuntu, Debian, Rocky, Oracle Linux, and more.
Narrows root-exploit windowFixes CVEs immediately upon release to block root escalation.
Predictable pricingFlat per-server cost regardless of monthly CVE volume.

FAQ

Common questions from hosting providers evaluating KernelCare

KernelCare is a live kernel patching solution that applies security updates in memory without requiring server reboots. For hosting providers, this means kernel CVEs get patched immediately while customer sites stay online — no maintenance windows, no downtime, no coordination headaches.

KernelCare applies patches directly to the running kernel in memory. When a new CVE patch becomes available, it downloads and installs automatically while your server continues operating normally. The vulnerability is actually fixed (not deferred or worked around) without any service interruption.

Yes. Live kernel patching has been production-proven for over a decade. KernelCare has applied hundreds of thousands of patches across millions of servers with the reliability you would expect from traditional patching. Every patch undergoes rigorous QA before release, and instant rollback is available if needed.

For kernel security patches, correct — no reboots required. Other updates like glibc or major OS upgrades may still require restarts, but those are far less frequent. Most hosting providers using KernelCare reduce their reboot frequency by 90% or more.

KernelCare supports 60+ Linux distributions including CloudLinux, AlmaLinux, Rocky Linux, RHEL, CentOS, Ubuntu, Debian, and Oracle Linux. If you are running CloudLinux, KernelCare integrates seamlessly as an add-on with the same management interface.

Patches typically deploy within hours of CVE disclosure, often before attackers have time to develop working exploits. This shrinks the vulnerability window from weeks (waiting for a maintenance window) to hours, significantly reducing your exposure to emerging threats.

KernelCare supports instant rollback without rebooting. If you encounter an issue with a patch, revert to the previous kernel state in seconds, diagnose the problem, and apply a fix when ready. This safety net exists, though it is rarely needed given the QA process patches undergo.

Start a 14-day free trial with instant license activation. Install the agent with a single command (no reboot required), and KernelCare begins protecting immediately. Most hosting providers complete setup in under 15 minutes per server.