CVE-2025-5187

Nodes can delete themselves by adding an OwnerReference

Description

A vulnerability exists in the NodeRestriction admission controller in Kubernetes clusters where node users can delete their corresponding node object by patching themselves with an OwnerReference to a cluster-scoped resource. If the OwnerReference resource does not exist or is subsequently deleted, the given node object will be deleted via garbage collection.

Remediation

Solution:

  • To mitigate this vulnerability, upgrade Kubernetes: https://kubernetes.io/docs/tasks/administer-cluster/cluster-upgrade/

Category

6.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Kubernetes Kubernetes
Published at:
Updated at:

References

Link Tags
https://github.com/kubernetes/kubernetes/issues/133471 issue tracking
https://groups.google.com/g/kubernetes-security-announce/c/znSNY7XCztE mailing list

Frequently Asked Questions

What is the severity of CVE-2025-5187?
CVE-2025-5187 has been scored as a medium severity vulnerability.
How to fix CVE-2025-5187?
To fix CVE-2025-5187: To mitigate this vulnerability, upgrade Kubernetes: https://kubernetes.io/docs/tasks/administer-cluster/cluster-upgrade/
Is CVE-2025-5187 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-5187 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-5187?
CVE-2025-5187 affects Kubernetes Kubernetes.
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