Peer Verification Bypass in KubeVirt Affecting Kubernetes Management
CVE-2025-64434

4.7MEDIUM

Key Information:

Vendor

Kubevirt

Status
Kubevirt
Vendor
CVE Published:
7 November 2025

What is CVE-2025-64434?

KubeVirt, a virtual machine management add-on for Kubernetes, has a vulnerability where improper peer verification logic in virt-handler can be exploited. An attacker who gains control over a virt-handler instance can leverage shared credentials to impersonate virt-api. This may lead to unauthorized privileged operations against other virt-handler instances, endangering the integrity and availability of the managed VMs. To mitigate this risk, users are required to upgrade to KubeVirt versions 1.5.3 or 1.6.1 and above.

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Affected Version(s)

kubevirt < 1.5.3 < 1.5.3

kubevirt >= 1.6.0-alpha.0, < 1.6.1 < 1.6.0-alpha.0, 1.6.1

References

https://github.com/kubevirt/kubevirt/security/advisories/...
x_refsource_CONFIRM
https://github.com/kubevirt/kubevirt/commit/231dc69723f33...
x_refsource_MISC
https://github.com/kubevirt/kubevirt/commit/af2f08a9a186e...
x_refsource_MISC

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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