The current CKS exam costs $445, is delivered online, proctored, performance-based, lasts 2 hours and is shown as valid for 2 years after passing.
CKS is a performance-based exam: candidates complete practical tasks in the supplied exam environment.
What Does CKS Exam Test?
CKS is designed around Kubernetes and cloud-native security specialization. The current objective areas cover cluster hardening, system hardening, workload vulnerabilities, supply-chain security and runtime security.
| Exam detail | Current CKS position | Why it matters |
|---|---|---|
| Exam-only price | $445 USD | Compare with training bundles only if you need structured preparation. |
| Format and duration | Online, proctored, performance-based; 2 hours | Practise in the same cognitive mode: timed tasks for performance exams, timed question sets for multiple-choice exams. |
| Prerequisite | You must have previously passed CKA; the CKA does not have to be active when you attempt CKS. | A new CKS candidate may need to budget for the CKA path first. |
| Purchase window | 12 months | Do not confuse purchase eligibility with certification validity. |
| Attempts | 2 attempts (one retake) | Leave enough time in the eligibility window to use the retake if needed. |
| Certification validity | 2 years | Set a renewal reminder well before expiry. |
You must have previously passed CKA before attempting CKS. The current page shows Kubernetes v1.35, and the 2026 CARE policy can make passing/recertifying CKS extend or reinstate a previously earned CKA.
What Does CKS-Specific Readiness Look Like?
What makes CKS different: security work sits on top of Kubernetes administration. The prior-CKA requirement is a useful warning: if routine cluster operations still consume most of your attention, security hardening and runtime/supply-chain work will be harder to complete under time pressure.
Practise security controls as working changes you can verify. A configuration is not finished merely because it looks stricter; you should be able to confirm what threat or exposure it reduces and whether the workload still behaves as intended.
What Are the CKS Prerequisites and Purchase Timing Rules?
You must have previously passed CKA; the CKA does not have to be active when you attempt CKS.
You currently have 12 months from purchase to take the exam. Leave enough room for the included retake rather than using the full eligibility window before attempt one.
What Does Online Exam Day Require?
The exam is remotely proctored. Review the current ID, computer, browser, webcam, display and room rules before the appointment.
How Does the CKS Exam Differ From Training?
The CKS exam validates hands-on Kubernetes security after a previous CKA pass, while Kubernetes Security Essentials (LFS260) is optional preparation aligned to that certification family. Buy the course only when its syllabus closes a real skill gap; candidates who already meet the objectives can choose exam-only.
Frequently asked questions
How much is the CKS exam?
The current exam-only list price is $445.
How long is the CKS exam?
The current duration is 2 hours.
Is CKS online?
Yes. The current format is Online, proctored, performance-based.
Sources checked
Current CKS price, format, duration, eligibility, attempts, validity and prerequisite information on this page were rechecked against the first-party sources below on 7 Sep 2026. Recheck the official product or policy page before purchase or exam day because changeable terms can move.
- CKS certification - Linux Foundation
- CARE Program - Linux Foundation
- Certification FAQ - Linux Foundation
Last fact check: 7 Sep 2026