How severe is CVE-2025-64432?

CVE-2025-64432 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-64432 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64432?

CVE-2025-64432 primarily affects Kubevirt. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-64432?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-64432 have an EU (EUVD) identifier?

Yes. CVE-2025-64432 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38218.

When was CVE-2025-64432 published?

CVE-2025-64432 was published on 2025-11-07 and last updated on 2026-06-17.

CVE-2025-64432

CVE-2025-64432 is a medium-severity vulnerability in Kubevirt with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38218
Weakness: CWE-287
Affected product: Kubevirt
Published: 2025-11-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-64432?: 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.
How severe is CVE-2025-64432?: CVE-2025-64432 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-64432 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64432?: CVE-2025-64432 primarily affects Kubevirt. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-64432?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-64432 have an EU (EUVD) identifier?: Yes. CVE-2025-64432 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38218.
When was CVE-2025-64432 published?: CVE-2025-64432 was published on 2025-11-07 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:kubevirt:kubevirt:*:*:*:*:*:kubernetes:*:*
cpe:2.3:a:kubevirt:kubevirt:1.6.0:-:*:*:*:kubernetes:*:*
cpe:2.3:a:kubevirt:kubevirt:1.6.0:rc0:*:*:*:kubernetes:*:*
cpe:2.3:a:kubevirt:kubevirt:1.6.0:rc1:*:*:*:kubernetes:*:*

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