CVE-2026-44316

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Source
https://cve.org/CVERecord?id=CVE-2026-44316
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44316.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44316
Aliases
Downstream
Related
Published
2026-05-27T15:52:07Z
Modified
2026-09-04T03:45:58Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
free5GC: PCF npcf-smpolicycontrol POST /sm-policies panics on downstream UDR/OpenAPI 404 via nil pointer dereference
Details

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-smpolicycontrol/v1/sm-policies handler (HandleCreateSmPolicyRequest) panics with a nil-pointer dereference when a downstream OpenAPI consumer call (UDR lookup) returns 404 Not Found and the consumer wrapper returns err != nil together with a nil response struct. The handler logs the OpenAPI error and continues executing instead of returning, then dereferences the nil response struct on a subsequent line and panics. Gin recovery converts the panic into HTTP 500, so a single attacker-shaped POST returns 500 instead of a clean 4xx whenever the downstream lookup fails. The PCF process keeps running. The trigger is a single POST containing input that causes the downstream UDR lookup to fail (e.g. an unknown DNN). In 4.2.1 this endpoint is also reachable WITHOUT an Authorization header because the PCF Npcf_SMPolicyControl route group is mounted without inbound auth middleware. This vulnerability is fixed in 4.2.2.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476",
        "CWE-754"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44316.json"
}
References

Affected packages

Git / github.com/free5gc/free5gc

Affected ranges

Type
GIT
Repo
https://github.com/free5gc/free5gc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8b0f4445fc931638fb624463ce3572a203517679
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.2.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}
Type
GIT
Repo
https://github.com/free5gc/pcf
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
df535f5524314620715e842baf9723efbeb481a7
Database specific
Show details 
{
    "source": "REFERENCES"
}

Affected versions

v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.2.7
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.4.1
v3.*
v3.0.5
v3.0.6
v3.0.7
v3.1.0
v3.1.1
v3.2.0
v3.2.1
v3.3.0
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.4.4
v3.4.5
v4.*
v4.0.0
v4.0.1
v4.1.0
v4.2.0
v4.2.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44316.json"