CVE-2025-64434
Medium
Description
KubeVirt is a virtual machine management add-on for Kubernetes. Prior to 1.5.3 and 1.6.1, due to the peer verification logic in virt-handler (via verifyPeerCert), an attacker who compromises a virt-handler instance, could exploit these shared credentials to impersonate virt-api and execute privileged operations against other virt-handler instances potentially compromising the integrity and availability of the VM managed by it. This vulnerability is fixed in 1.5.3 and 1.6.1.
SeverityMedium
CVSS4.7
Exploit probability—
ProductKubevirt
PublishedNov 7, 2025
First seenNov 7, 2025
Weakness typeCWE-287Improper authentication
How to fix
Update
- kubevirt kubevirt1.5.3 or later
- kubevirt.io/kubevirt1.5.3, 1.6.1, 1.6.0-beta.0.0.20250730135146-231dc69723f3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kubevirt kubevirt | v < 1.5.3, 1.6.0 | 1.5.3 |
| kubevirt.io/kubevirtGo | v < 1.5.3, 1.6.0-alpha.0 ≤ v < 1.6.1, 1.6.0-alpha.0 ≤ v < 1.6.0-beta.0.0.20250730135146-231dc69723f3, 1.6.0-rc.0 ≤ v < 1.6.1 | 1.5.3, 1.6.1, 1.6.0-beta.0.0.20250730135146-231dc69723f3 |
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