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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/free5gc/free5gc/issues/879	Exploit Issue Tracking
https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7w	Exploit Vendor Advisory
https://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aeb	Patch
https://github.com/free5gc/pcf/pull/65	Issue Tracking Patch
https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7w	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-27 17:16

Updated : 2026-06-17 10:50

NVD link : CVE-2026-44317

Mitre link : CVE-2026-44317

CVE.ORG link : CVE-2026-44317

JSON object : View

Products Affected

free5gc

free5gc

CWE

CWE-476

NULL Pointer Dereference

CWE-754

Improper Check for Unusual or Exceptional Conditions

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