CVE-2026-44324

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/free5gc/free5gc/issues/920	Exploit Issue Tracking
https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63	Exploit Vendor Advisory
https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99	Patch
https://github.com/free5gc/udr/pull/60	Issue Tracking Patch
https://github.com/free5gc/free5gc/issues/920	Exploit Issue Tracking
https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-27 17:16

Updated : 2026-06-17 10:50

NVD link : CVE-2026-44324

Mitre link : CVE-2026-44324

CVE.ORG link : CVE-2026-44324

JSON object : View

Products Affected

free5gc

free5gc

CWE

CWE-704

Incorrect Type Conversion or Cast

CWE-754

Improper Check for Unusual or Exceptional Conditions

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