Vulnerability in Kubevirt
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (10.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Kubevirt — versions >= 1.6.0-alpha.0, < 1.6.1, < 1.5.3, 1.6.0
Weakness classification (CWE)
References
- github.com/kubevirt/kubevirt/security/advisories/GHSA-2r4r-5x78-mvqf (Exploit, Vendor Advisory)
- github.com/kubevirt/kubevirt/commit/3ce9f41c54d04a65f10b23a46771391c00659afb (Patch)
- github.com/kubevirt/kubevirt/commit/8644dbe0d04784b0bfa8395b91ecbd6001f88f6b (Patch)
- github.com/kubevirt/kubevirt/commit/f59ca63133f25de8fceb3e2a0e5cc0b7bdb6a265 (Patch)
Frequently asked questions
- What is CVE-2025-64437?
- CVE-2025-64437 is a medium-severity vulnerability in Kubevirt, classified under Improper Link Resolution Before File Access. CVSS score: 5.0/10. Published 2025-11-07.
- How severe is CVE-2025-64437?
- Medium severity. CVSS v3 base score is 5.0 out of 10.