Vulnerability · Published Nov 7, 2025 · Assigned by GitHub_M
CVE-2025-64437KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes
Medium 5.0
In plain English
A medium-severity security flaw in kubevirt from kubevirt. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | kubevirt.io/kubevirt | 1.5.3 | GHSA-2r4r-5x78-mvqf |
| Go | kubevirt.io/kubevirt | 1.6.1 | GHSA-2r4r-5x78-mvqf |
| Go | kubevirt.io/kubevirt | 1.5.3, 1.6.0-beta.0.0.20250801202148-3ce9f41c54d0 | GO-2025-4102 |
Affected products (as reported)
Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
References
- https://github.com/kubevirt/kubevirt/security/advisories/GHSA-2r4r-5x78-mvqf x_refsource_CONFIRM
- https://github.com/kubevirt/kubevirt/commit/3ce9f41c54d04a65f10b23a46771391c00659afb x_refsource_MISC
- https://github.com/kubevirt/kubevirt/commit/8644dbe0d04784b0bfa8395b91ecbd6001f88f6b x_refsource_MISC
- https://github.com/kubevirt/kubevirt/commit/f59ca63133f25de8fceb3e2a0e5cc0b7bdb6a265 x_refsource_MISC