CVE-2026-13218

Description

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.

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Produits concernés

• Red Hat OpenShift Virtualization 4
• Kubevirt kubevirt
• Redhat openshift virtualization

Scores CVSS

Faiblesses (CWE)

• CWE-61

Références

• https://access.redhat.com/security/cve/CVE-2026-13218 Vendor AdvisoryMitigation
• https://bugzilla.redhat.com/show_bug.cgi?id=2492654 Issue TrackingVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories