Vulnerability Description
KubeVirt is a virtual machine management add-on for Kubernetes. Versions 1.5.3 and below, and 1.6.0 contained a flawed implementation of the Kubernetes aggregation layer's authentication flow which could enable bypass of RBAC controls. It was discovered that the virt-api component fails to correctly authenticate the client when receiving API requests over mTLS. In particular, it fails to validate the CN (Common Name) field in the received client TLS certificates against the set of allowed values defined in the extension-apiserver-authentication configmap. Failre to validate certain fields in the client TLS certificate may allow an attacker to bypass existing RBAC controls by directly communicating with the aggregated API server, impersonating the Kubernetes API server and its aggregator component. This issue is fixed in versions 1.5.3 and 1.6.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kubevirt | Kubevirt | < 1.5.3 |
Related Weaknesses (CWE)
References
- https://github.com/kubevirt/kubevirt/commit/231dc69723f331dc02f65a31ab4c3d6869f4Patch
- https://github.com/kubevirt/kubevirt/commit/af2f08a9a186eccc650f87c30ab3e07b669ePatch
- https://github.com/kubevirt/kubevirt/commit/b9773bc588e6e18ece896a2dad5336ef7a65Patch
- https://github.com/kubevirt/kubevirt/security/advisories/GHSA-38jw-g2qx-4286ExploitVendor Advisory
FAQ
What is CVE-2025-64432?
CVE-2025-64432 is a vulnerability with a CVSS score of 4.7 (MEDIUM). KubeVirt is a virtual machine management add-on for Kubernetes. Versions 1.5.3 and below, and 1.6.0 contained a flawed implementation of the Kubernetes aggregation layer's authentication flow which co...
How severe is CVE-2025-64432?
CVE-2025-64432 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-64432?
Check the references section above for vendor advisories and patch information. Affected products include: Kubevirt Kubevirt.