Directory Traversal Affecting kubevirt-virtctl package, versions <1.6.3-150700.3.13.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-SLES157-KUBEVIRTVIRTCTL-14287440
  • published10 Dec 2025
  • disclosed9 Dec 2025

Introduced: 9 Dec 2025

NewCVE-2025-64433  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kubevirt-virtctl to version 1.6.3-150700.3.13.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kubevirt-virtctl package and not the kubevirt-virtctl package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

KubeVirt is a virtual machine management add-on for Kubernetes. Prior to 1.5.3 and 1.6.1, a vulnerability was discovered that allows a VM to read arbitrary files from the virt-launcher pod's file system. This issue stems from improper symlink handling when mounting PVC disks into a VM. Specifically, if a malicious user has full or partial control over the contents of a PVC, they can create a symbolic link that points to a file within the virt-launcher pod's file system. Since libvirt can treat regular files as block devices, any file on the pod's file system that is symlinked in this way can be mounted into the VM and subsequently read. Although a security mechanism exists where VMs are executed as an unprivileged user with UID 107 inside the virt-launcher container, limiting the scope of accessible resources, this restriction is bypassed due to a second vulnerability. The latter causes the ownership of any file intended for mounting to be changed to the unprivileged user with UID 107 prior to mounting. As a result, an attacker can gain access to and read arbitrary files located within the virt-launcher pod's file system or on a mounted PVC from within the guest VM. This vulnerability is fixed in 1.5.3 and 1.6.1.

CVSS Base Scores

version 3.1