CVE-2026-75439

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component"}], "id": "CVE-2026-75439", "lastModified": "2026-09-14T14:17:09.723", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-75439", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-14T13:10:31.465834Z", "version": "2.0.3"}}]}, "published": "2026-09-04T21:17:25.583", "references": [{"source": "cve@mitre.org", "url": "https://gist.github.com/hackeryounow/0f434c03008462e6eec3b43ed3cd12d8"}, {"source": "cve@mitre.org", "url": "https://github.com/free5gc/free5gc/issues/1059"}, {"source": "cve@mitre.org", "url": "https://github.com/free5gc/free5gc/issues/1059.https://github.com/free5gc/go-upf/pull/97"}, {"source": "cve@mitre.org", "url": "https://github.com/free5gc/go-upf/pull/97"}, {"source": "cve@mitre.org", "url": "https://github.com/hackeryounow/5GCVulDB/tree/main/CVE-2026-75439"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.2.2"}}], "enrichment": {"confidence": 75.0, "confidence_source": "inferred", "scores": [{"score": 75.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "upf", "vendor": "free5gc"}], "created": "2026-09-04T22:00:06.285449+00:00", "title": "Denial of Service via Null Pointer Dereference in Free5GC UPF", "updated": "2026-09-21T07:45:11.988668+00:00", "vendors": ["free5gc", "free5gc$PRODUCT$upf"]}