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CVE-2025-64437

5.0 · MEDIUM

KubeVirt is a virtual machine management add-on for Kubernetes.

Published Nov 7, 2025CWE-59EPSS 0.23%

Overview

CVE-2025-64437 is a medium-severity vulnerability. It was published on November 7, 2025 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

KubeVirt is a virtual machine management add-on for Kubernetes. In versions before 1.5.3 and 1.6.1, the virt-handler does not verify whether the launcher-sock is a symlink or a regular file. This oversight can be exploited, for example, to change the ownership of arbitrary files on the host node to the unprivileged user with UID 107 (the same user used by virt-launcher) thus, compromising the CIA (Confidentiality, Integrity and Availability) of data on the host. To successfully exploit this vulnerability, an attacker should be in control of the file system of the virt-launcher pod. This vulnerability is fixed in 1.5.3 and 1.6.1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/kubevirt/kubevirt/commit/3ce9f41c54d04a65f10b23a46771391c00659afbGitHubgithub.com/kubevirt/kubevirt/commit/8644dbe0d04784b0bfa8395b91ecbd6001f88f6bGitHubgithub.com/kubevirt/kubevirt/commit/f59ca63133f25de8fceb3e2a0e5cc0b7bdb6a265GitHubgithub.com/kubevirt/kubevirt/security/advisories/GHSA-2r4r-5x78-mvqf

How CyberStrike helps

Frequently asked questions

What is CVE-2025-64437?

CVE-2025-64437 is a medium-severity vulnerability. It was published on November 7, 2025 and has a CVSS 3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2025-64437?

This vulnerability has a CVSS 3.1 base score of 5.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-64437?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-64437?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-64437 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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