- A
capabilities.add: ["SYS_ADMIN"]
Why wrong: This adds capabilities, does not prevent escalation.
- B
runAsNonRoot
Why wrong: This ensures the container does not run as root, but does not directly prevent privilege escalation.
- C
allowPrivilegeEscalation
Setting allowPrivilegeEscalation: false prevents privilege escalation inside the container.
- D
privileged
Why wrong: Setting privileged: false prevents privileged access but not necessarily privilege escalation.
Question 328 of 997
Prevent Privilege Escalation in Containers with allowPrivilegeEscalation: false
This CKS practice question tests your understanding of minimize microservice vulnerabilities. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 Pod's securityContext prevents privilege escalation by the container?
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 C is correct because `allowPrivilegeEscalation` controls whether a process can gain more privileges than its parent process. In a Pod's securityContext, setting this field to `false` prevents the container from performing privilege escalation, such as via setuid binaries or system calls like `setuid(0)`. This directly mitigates a common attack vector where an attacker exploits a container process to gain root access.
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.
- ✗
capabilities.add: ["SYS_ADMIN"]
Why it's wrong here
This adds capabilities, does not prevent escalation.
- ✗
runAsNonRoot
Why it's wrong here
This ensures the container does not run as root, but does not directly prevent privilege escalation.
- ✓
allowPrivilegeEscalation
Why this is correct
Setting allowPrivilegeEscalation: false prevents privilege escalation inside the container.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
privileged
Why it's wrong here
Setting privileged: false prevents privileged access but not necessarily privilege escalation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests this by having candidates confuse `allowPrivilegeEscalation` with `runAsNonRoot`, where the trap is that `runAsNonRoot` only sets the initial user but does not block subsequent privilege escalation via setuid binaries or capability-based syscalls.
Detailed technical explanation
How to think about this question
Under the hood, `allowPrivilegeEscalation` maps to the `no_new_privs` flag in the Linux kernel, which is set on the container's process. When this flag is active, operations like `setuid(0)` or executing a setuid binary will fail, even if the binary has the SUID bit set. This is critical in multi-tenant environments where a compromised container must be contained, as it prevents an attacker from gaining root privileges even if they exploit a vulnerability in a setuid binary.
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 C is correct because `allowPrivilegeEscalation` controls whether a process can gain more privileges than its parent process. In a Pod's securityContext, setting this field to `false` prevents the container from performing privilege escalation, such as via setuid binaries or system calls like `setuid(0)`. This directly mitigates a common attack vector where an attacker exploits a container process to gain root access.
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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