Vulnerability Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Free5Gc | Free5Gc | < 4.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/free5gc/free5gc/issues/919ExploitIssue Tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-4rqf-grm6-vf75ExploitVendor Advisory
- https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99Patch
- https://github.com/free5gc/udr/pull/60Issue TrackingPatch
FAQ
What is CVE-2026-44323?
CVE-2026-44323 is a vulnerability with a CVSS score of 4.3 (MEDIUM). free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions hand...
How severe is CVE-2026-44323?
CVE-2026-44323 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44323?
Check the references section above for vendor advisories and patch information. Affected products include: Free5Gc Free5Gc.