CVE-2025-14459
📋 TL;DR
This vulnerability in KubeVirt Containerized Data Importer (CDI) allows authenticated users to clone PersistentVolumeClaims from namespaces they shouldn't have access to, potentially exposing sensitive data. It affects Kubernetes clusters using CDI for data management. The vulnerability exploits the DataImportCron PVC source mechanism to bypass namespace isolation controls.
💻 Affected Systems
- KubeVirt Containerized Data Importer (CDI)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
An attacker with cluster access could exfiltrate sensitive data from any namespace, including secrets, configuration data, or proprietary information, leading to data breach and compliance violations.
Likely Case
Malicious or compromised users within a cluster could access data from other projects or teams, violating multi-tenancy isolation and potentially exposing sensitive business data.
If Mitigated
With proper RBAC controls and network policies, impact is limited to authorized users who might still exceed their intended permissions within allowed namespaces.
🎯 Exploit Status
Exploitation requires authenticated access to the Kubernetes cluster and knowledge of the DataImportCron feature.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Red Hat advisory RHSA-2026:0950 for specific fixed versions
Vendor Advisory: https://access.redhat.com/errata/RHSA-2026:0950
Restart Required: Yes
Instructions:
1. Update CDI to the patched version specified in RHSA-2026:0950. 2. Restart CDI controller and importer pods. 3. Verify namespace isolation is enforced.
🔧 Temporary Workarounds
Restrict DataImportCron permissions
linuxLimit RBAC permissions for DataImportCron creation and modification to trusted users only.
kubectl apply -f restricted-rbac.yaml
Disable DataImportCron feature
linuxTemporarily disable DataImportCron functionality if not required.
kubectl patch cdi cdi --type=merge -p '{"spec":{"config":{"featureGates":["-dataImportCron"]}}}'
🧯 If You Can't Patch
- Implement strict network policies to limit pod-to-pod communication between namespaces.
- Enhance monitoring and alerting for unauthorized PVC cloning attempts across namespaces.
🔍 How to Verify
Check if Vulnerable:
Check CDI version and verify if DataImportCron can clone PVCs from unauthorized namespaces in your cluster.Check Version:
kubectl get csv -n cdi -o jsonpath='{.items[*].spec.version}'Verify Fix Applied:
Test that DataImportCron PVC cloning respects namespace boundaries after applying the patch.📡 Detection & Monitoring
Log Indicators:
- Unauthorized PVC cloning events in CDI controller logs
- DataImportCron creation/modification events from unexpected users
Network Indicators:
- Unexpected data transfers between namespaces
- PVC mount operations across namespace boundaries
SIEM Query:
source="cdi-controller" AND ("clone" OR "DataImportCron") AND namespace!="expected_namespace"