- A
privileged
Why wrong: privileged: true gives full privileges; the opposite is not the field to prevent escalation.
- B
readOnlyRootFilesystem
Why wrong: readOnlyRootFilesystem makes the root filesystem read-only but does not control privilege escalation.
- C
runAsNonRoot
Why wrong: runAsNonRoot prevents running as root but does not prevent privilege escalation via setuid binaries.
- D
allowPrivilegeEscalation
allowPrivilegeEscalation: false prevents the container from gaining more privileges than its parent process.
Question 39 of 997
Preventing Privilege Escalation with allowPrivilegeEscalation
This CKS practice question tests your understanding of minimize microservice vulnerabilities. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which field in a PodSecurityContext ensures that the container cannot gain privileges beyond its parent process?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
allowPrivilegeEscalation
Option D is correct because `allowPrivilegeEscalation` directly controls whether a process can gain more privileges than its parent process, such as via setuid binaries or file capabilities. When set to `false` in the PodSecurityContext, it ensures that no child process can obtain elevated privileges, which is a key security control to prevent privilege escalation attacks within a container.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
privileged
Why it's wrong here
privileged: true gives full privileges; the opposite is not the field to prevent escalation.
- ✗
readOnlyRootFilesystem
Why it's wrong here
readOnlyRootFilesystem makes the root filesystem read-only but does not control privilege escalation.
- ✗
runAsNonRoot
Why it's wrong here
runAsNonRoot prevents running as root but does not prevent privilege escalation via setuid binaries.
- ✓
allowPrivilegeEscalation
Why this is correct
allowPrivilegeEscalation: false prevents the container from gaining more privileges than its parent process.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse `runAsNonRoot` with preventing privilege escalation, not realizing that a non-root user can still gain elevated privileges through setuid binaries or capabilities unless `allowPrivilegeEscalation` is explicitly disabled.
Detailed technical explanation
How to think about this question
Under the hood, `allowPrivilegeEscalation` corresponds to the `no_new_privs` flag in the Linux kernel, which prevents the process from gaining new privileges via execve, setuid, or file capabilities. In a real-world scenario, even if a container runs as non-root, a misconfigured binary with the setuid bit could allow privilege escalation unless `allowPrivilegeEscalation` is explicitly set to `false`. This field is also critical when using SecurityContextConstraints (SCCs) in OpenShift or PodSecurityPolicies in older Kubernetes versions.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CKS question test?
Minimize Microservice Vulnerabilities — This question tests Minimize Microservice Vulnerabilities — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: allowPrivilegeEscalation — Option D is correct because `allowPrivilegeEscalation` directly controls whether a process can gain more privileges than its parent process, such as via setuid binaries or file capabilities. When set to `false` in the PodSecurityContext, it ensures that no child process can obtain elevated privileges, which is a key security control to prevent privilege escalation attacks within a container.
What should I do if I get this CKS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This CKS practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CKS exam.
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