CVE-2025-64436: kubevirt Privilege Escalation — Exploit

Description

KubeVirt is a virtual machine management add-on for Kubernetes. In 1.5.0 and earlier, the permissions granted to the virt-handler service account, such as the ability to update VMI and patch nodes, could be abused to force a VMI migration to an attacker-controlled node. This vulnerability could otherwise allow an attacker to mark all nodes as unschedulable, potentially forcing the migration or creation of privileged pods onto a compromised node.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-269 CWE-269

CWE-276 Incorrect Default Permissions

Affected Products

Vendor	Product	Versions
kubevirt	kubevirt	< 1.5.3
kubevirt	kubevirt	1.6.0 — 1.6.1

References

Advisories & Patches

https://github.com/kubevirt/kubevirt/security/advisories/GHSA-7xgm-5prm-v5gc

Exploits

https://github.com/kubevirt/kubevirt/security/advisories/GHSA-7xgm-5prm-v5gc

Frequently Asked Questions

What is CVE-2025-64436? +

KubeVirt is a virtual machine management add-on for Kubernetes. In 1.5.0 and earlier, the permissions granted to the virt-handler service account, such as the ability to update VMI and patch nodes, could be abused to force a VMI migration to an attacker-controlled node. This vulnerability could otherwise allow an attacker to mark all nodes as unschedulable, potentially forcing the migration or creation of privileged pods onto a compromised node. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-64436? +

CVE-2025-64436 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-64436? +

CVE-2025-64436 affects products from kubevirt, specifically: kubevirt. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64436? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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