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.

Weakness classification

• CWE-476: NULL Pointer Dereference
• CWE-754: Improper Check for Unusual or Exceptional Conditions

Primary references

• security-advisories@github.com — Exploit, Issue Tracking
• security-advisories@github.com — Exploit, Vendor Advisory
• security-advisories@github.com — Patch
• security-advisories@github.com — Issue Tracking, Patch
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Vendor Advisory