# CVE-2026-44324

## Summary

- **CVE ID:** CVE-2026-44324
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-704, CWE-754
- **Published:** May 27, 2026
- **Last Modified:** May 28, 2026

## 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 panics on a single authenticated request against a fresh UDR instance when the supplied ueId does not exist in UESubsCollection. The processor checks value, ok := udrSelf.UESubsCollection.Load(ueId) and sets a 404 USER_NOT_FOUND problem-details on the miss path, but execution continues and immediately runs value.(*udr_context.UESubsData) -- a Go type assertion on a nil interface, which panics with interface conversion: interface {} is nil, not *context.UESubsData. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.

## Affected Products

- free5gc — free5gc (< 4.2.2)

## References

- [CNA](https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63)
- [CNA](https://github.com/free5gc/free5gc/issues/920)
- [CNA](https://github.com/free5gc/udr/pull/60)
- [CNA](https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._