medium4.2
CVE-2026-13218
A flaw was found in KubeVirt's virt-handler network cache handling.
Impact
A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile function writes data to a launcher-rooted path using os.WriteFile and os.Chown without symlink protection. A user with access to the virt-launcher container can plant a symlink at the cache file path, causing virt-handler to follow it and overwrite an arbitrary host file with JSON content and change its ownership.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Kubevirt | Kubevirt | All versions |
| Redhat | Openshift Virtualization | from 4 through 4.22.0 |