Incorrect Permission Assignment for Critical Resource Affecting github.com/kubevirt/kubevirt/pkg/util/tls package, versions <1.5.3>=1.6.0-alpha.0 <1.6.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMKUBEVIRTKUBEVIRTPKGUTILTLS-13863405
- published9 Nov 2025
- disclosed7 Nov 2025
- creditMihail Kirov, Sébastien Rolland
Introduced: 7 Nov 2025
NewCVE-2025-64432 Â (opens in a new tab)How to fix?
Upgrade github.com/kubevirt/kubevirt/pkg/util/tls to version 1.5.3, 1.6.1 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Permission Assignment for Critical Resource due to the virt-api component failing to validate the CN field in client TLS certificates against allowed values in the extension-apiserver-authentication configmap. An attacker can bypass RBAC controls by impersonating the Kubernetes API server and its aggregator component through direct communication with the aggregated API server.
Note:
These prerequisites must be met for successful exploitation:
The attacker must possess a valid front-end proxy certificate signed by the trusted CA (
requestheader-client-ca-file). For example, they can steal the certificate material by compromising a front-end proxy or they could obtain a bundle by exploiting a poorly configured and managed PKI system.The attacker must have network access to the
virt-apiservice, such as via a compromised or controlled pod within the cluster.