CVE-2026-44323
4.3 MEDIUMfree5GC is an open-source implementation of the 5G core network
Published: 2026-05-27 · Last updated: 2026-05-28
Severity and scoring
- CVSS
- 4.3 MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CWE
- CWE-476
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 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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-44323
- [Exploit reference]https://github.com/free5gc/free5gc/issues/919
- [Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-4rqf-grm6-vf75
- [Patch]https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99
- [Patch]https://github.com/free5gc/udr/pull/60
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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