CVE-2025-64433

Aliases:GHSA-qw6q-3pgr-5cwqGO-2025-4109
Advisory lineage Upstream: 0 Downstream: 8
Analyzed
Published: 07 Nov 2025, 23:07
Last modified:10 Nov 2025, 16:52

Vulnerability Summary

Overall Risk (default)
medium
36/100
CVSS Score
6.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.47% LOW
0% probability +0.41%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

07 Nov 2025, 23:07
Published
Vulnerability first disclosed
10 Nov 2025, 16:52
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Trends

Current EPSS score: 0.47%• Percentile: 38%

Techniques & Countermeasures

  • CWE-22•Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

    The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Affected Systems

  • kubevirt.io•kubevirt

    < 1.5.3 | ≥ 1.6.0-alpha.0, < 1.6.1 | ≥ 1.6.0-rc.0, < 1.6.1

  • kubevirt•kubevirt

    ≥ 1.6.0-alpha.0, < 1.6.1 | < 1.5.3 | 1.6.0 | 1.6.0:alpha0 | 1.6.0:beta0 | 1.6.0:rc0 | 1.6.0:rc1

References (6)