Vulnerability Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose ascReqData.suppFeat == "1" (enabling traffic-routing feature negotiation) and whose medComponents entries supply an afAppId but NO AfRoutReq. The create path then calls provisioningOfTrafficRoutingInfo(smPolicy, appID, routeReq, ...) with routeReq == nil and dereferences routeReq.RouteToLocs (and other fields) without a nil check, causing runtime error: invalid memory address or nil pointer dereference. Gin recovery converts the panic into HTTP 500. 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/879ExploitIssue Tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7wExploitVendor Advisory
- https://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aebPatch
- https://github.com/free5gc/pcf/pull/65Issue TrackingPatch
- https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7wExploitVendor Advisory
FAQ
What is CVE-2026-44317?
CVE-2026-44317 is a vulnerability with a CVSS score of 6.5 (MEDIUM). free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose asc...
How severe is CVE-2026-44317?
CVE-2026-44317 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44317?
Check the references section above for vendor advisories and patch information. Affected products include: Free5Gc Free5Gc.