CVE-2025-4563 Nodes can bypass dynamic resource allocation authorization checks
A compromised node can bypass authorization checks to create mirror pods accessing unauthorized dynamic resources, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-4563?
CVE-2025-4563 is a low-severity missing authorization vulnerability in Kubernetes, published on 23 Jun 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability exists in the NodeRestriction admission controller where nodes can bypass dynamic resource allocation authorization checks. When the DynamicResourceAllocation feature gate is enabled, the controller properly validates resource claim statuses during pod status updates but fails to perform equivalent validation during pod creation. This allows a compromised node to create mirror pods that access unauthorized dynamic resources, potentially leading to privilege escalation.
Weakness: CWE-20
Which versions are affected by CVE-2025-4563?
5 open source packages ship an affected version, including k8s.io/kubernetes.
| Package | Affected | Fixed in |
|---|---|---|
k8s.io/kubernetes Go | From 1.32.0 | 1.32.6, 1.33.2 |
k8s.io/kubernetes Go | From 1.32.0 | 1.32.6 |
k8s.io/kubernetes Go | From 1.32.0 | 1.32.6 |
k8s.io/kubernetes Go | From 1.33.0 | 1.33.2 |
k8s.io/kubernetes Go | From 1.33.0 | 1.33.2 |
How do I fix CVE-2025-4563?
Upgrade k8s.io/kubernetes to a fixed version for your release line: 1.32.6 or 1.33.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-4563 being exploited?
There is no known exploitation of CVE-2025-4563 in the wild and no public exploit code.
Sources
Also known as AZL-64304, CLEANSTART-2026-GL41768, CLEANSTART-2026-HE47180, DEBIAN-CVE-2025-4563, GHSA-hj2p-8wj8-pfq4, GO-2025-3774 and 12 more.