How severe is CVE-2025-64437?

CVE-2025-64437 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-64437 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64437?

CVE-2025-64437 primarily affects Kubevirt. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-64437?

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

Does CVE-2025-64437 have an EU (EUVD) identifier?

Yes. CVE-2025-64437 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38213.

When was CVE-2025-64437 published?

CVE-2025-64437 was published on 2025-11-07 and last updated on 2026-06-17.

CVE-2025-64437

CVE-2025-64437 is a medium-severity vulnerability in Kubevirt with a CVSS 3.x base score of 5.0. 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38213
Weakness: CWE-59
Affected product: Kubevirt
Published: 2025-11-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-64437?: 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.
How severe is CVE-2025-64437?: CVE-2025-64437 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-64437 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64437?: CVE-2025-64437 primarily affects Kubevirt. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-64437?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-64437 have an EU (EUVD) identifier?: Yes. CVE-2025-64437 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38213.
When was CVE-2025-64437 published?: CVE-2025-64437 was published on 2025-11-07 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:kubevirt:kubevirt:*:*:*:*:*:kubernetes:*:*
cpe:2.3:a:kubevirt:kubevirt:1.6.0:*:*:*:*:kubernetes:*:*

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