CVE-2025-64432

Aliases:GHSA-38jw-g2qx-4286GO-2025-4103
Advisory lineage Upstream: 0 Downstream: 5
Analyzed
Published: 07 Nov 2025, 18:38
Last modified:07 Nov 2025, 18:54

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
4.7 MEDIUM
v3.1 (cve.org)
EPSS Score
0.14% LOW
0% probability +0.13%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

07 Nov 2025, 18:38
Published
Vulnerability first disclosed
07 Nov 2025, 18:54
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.14%• Percentile: 4%

Techniques & Countermeasures

  • CWE-287•Improper Authentication

    When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

  • CWE-295•Improper Certificate Validation

    The product does not validate, or incorrectly validates, a certificate.

Affected Systems

  • kubevirt.io•kubevirt

    < 1.5.3 | ≥ 1.6.0-alpha.0, < 1.6.1 | ≥ 1.7.0-alpha.0, < 1.7.0-rc.0 | ≥ 1.6.2, < 1.7.0-rc.0

  • kubevirt•kubevirt

    ≥ 1.6.0, < 1.6.1 | < 1.5.3 | 1.6.0 | 1.6.0:rc0 | 1.6.0:rc1

References (6)