CVE-2026-44317
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.
How to fix
- free5gc free5gc4.2.2 or later
- github.com/free5gc/pcf1.4.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| free5gc free5gc | v < 4.2.2 | 4.2.2 |
| github.com/free5gc/pcfGo | v < 1.4.3 | 1.4.3 |
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