CVE-2025-46599
First published: Fri Apr 25 2025(Updated: )
CNCF K3s 1.32 before 1.32.4-rc1+k3s1 has a Kubernetes kubelet configuration change with the unintended consequence that, in some situations, ReadOnlyPort is set to 10255. For example, the default behavior of a K3s online installation might allow unauthenticated access to this port, exposing credentials.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| K3s | <1.32.4-rc1+k3s1 | |
| go/github.com/k3s-io/k3s | >=1.32.0-rc1<1.32.4-rc1 | 1.32.4-rc1 |
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Reference Links
- https://github.com/f1veT/BUG/issues/2
- https://cloud.google.com/kubernetes-engine/docs/how-to/disable-kubelet-readonly-port
- https://github.com/k3s-io/k3s/issues/12164
- https://github.com/k3s-io/k3s/commit/097b63e588e3c844cdf9b967bcd0a69f4fc0aa0a
- https://github.com/k3s-io/k3s/compare/v1.32.3+k3s1...v1.32.4-rc1+k3s1
- https://nvd.nist.gov/vuln/detail/CVE-2025-46599
- https://github.com/advisories/GHSA-864f-7xjm-2jp2 (Advisory)
- https://pkg.go.dev/vuln/GO-2025-3646
Frequently Asked Questions
What is the severity of CVE-2025-46599?
CVE-2025-46599 is considered a critical vulnerability due to the potential for unauthorized access to sensitive information.
How do I fix CVE-2025-46599?
To fix CVE-2025-46599, upgrade K3s to version 1.32.4-rc1+k3s1 or later, where the ReadOnlyPort is properly configured.
What are the risks associated with CVE-2025-46599?
The risks of CVE-2025-46599 include exposing potentially sensitive credentials and information to unauthorized users due to incorrect kubelet configuration.
Which versions of K3s are affected by CVE-2025-46599?
CVE-2025-46599 affects K3s versions prior to 1.32.4-rc1+k3s1.
Is there a workaround for CVE-2025-46599 if immediate patching isn't possible?
Yes, temporarily disabling the ReadOnlyPort can serve as a workaround until a proper upgrade can be applied.
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