CVE-2025-64432

MEDIUM EPSS 2.9%
Published Nov 7, 20257mo ago · Modified Jun 17, 20261w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Nov 7, 2025 7mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-287 Improper Authentication Authentication
CWE-295

Affected Products 4

VendorProductVersionRange
kubevirtkubevirt* <1.5.3
kubevirtkubevirt1.6.0any
kubevirtkubevirt1.6.0any
kubevirtkubevirt1.6.0any

References 4

  • github.com https://github.com/kubevirt/kubevirt/commit/231dc69723f331dc02f65a31ab4c3d6869f40d6a
    Patch
  • github.com https://github.com/kubevirt/kubevirt/commit/af2f08a9a186eccc650f87c30ab3e07b669e8b5b
    Patch
  • github.com https://github.com/kubevirt/kubevirt/commit/b9773bc588e6e18ece896a2dad5336ef7a653074
    Patch
  • github.com https://github.com/kubevirt/kubevirt/security/advisories/GHSA-38jw-g2qx-4286
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/kubevirt/kubevirt/commit/231dc69723f331dc02f65a31ab4c3d6869f40d6a
    Patch
  • github.com https://github.com/kubevirt/kubevirt/commit/af2f08a9a186eccc650f87c30ab3e07b669e8b5b
    Patch
  • github.com https://github.com/kubevirt/kubevirt/commit/b9773bc588e6e18ece896a2dad5336ef7a653074
    Patch