CVE-2026-44324

6.5 MEDIUM

free5GC is an open-source implementation of the 5G core network

Published: 2026-05-27 · Last updated: 2026-05-28

Severity and scoring

CVSS: 6.5 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-704, CWE-754

Affected products

Vendor	Product
free5gc	free5gc

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-44324
[Exploit reference]https://github.com/free5gc/free5gc/issues/920
[Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63
[Patch]https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99
[Patch]https://github.com/free5gc/udr/pull/60
[Exploit reference]https://github.com/free5gc/free5gc/issues/920
[Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63

Related CVEs

Same vendor

CVE-2026-44330 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
CVE-2026-44329 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
CVE-2026-44328 — free5GC is an open-source implementation of the 5G core network (8.2 HIGH)
CVE-2026-44327 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
CVE-2026-44326 — free5GC is an open-source implementation of the 5G core network (9.4 CRITICAL)

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