CVE-2026-44317
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 3.1
- 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-476, CWE-754
- Published
- Modified
- Record from
- the NVD, synced
Affected
- free5gc:free5gc
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wwqh-7jm5-gj7w | Go | github.com/free5gc/pcf | <1.4.3 | 1.4.3 |
| GO-2026-5731 | Go | github.com/free5gc/pcf | <1.4.3 | 1.4.3 |
References
- https://github.com/free5gc/free5gc/issues/879
- https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7w
- https://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aeb
- https://github.com/free5gc/pcf/pull/65
- https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7w