free5GC: PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing AfRoutReq via nil pointer dereference_CVE-2026-44317

{
    "lastseen": "",
    "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.",
    "published": "2026-05-27T15:50:18.242Z",
    "modified": "2026-05-27T15:50:18.242Z",
    "type": "cve",
    "title": "free5GC: PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing AfRoutReq via nil pointer dereference",
    "source": "GitHub_M",
    "references": "https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7w\nhttps://github.com/free5gc/free5gc/issues/879\nhttps://github.com/free5gc/pcf/pull/65\nhttps://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aeb",
    "id": "CVE-2026-44317",
    "bulletinFamily": "",
    "cwe": [
        "CWE-476",
        "CWE-754"
    ],
    "cvelist": null,
    "sourceData": "free5gc free5gc < 4.2.2",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "free5gc",
    "version": "< 4.2.2",
    "vendor": "free5gc",
    "ai_description": "",
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    "ai_score": 0
}