Open5GS NGAP Handover gmm-sm.c gmm_state_security_mode race condition

{
  "id": "35bd44ba817a6d7ac9d3296fe4f3a12b7e433ac4c3614efc5cc977d3d65964b2",
  "url": "https://osv.dev/vulnerability/CVE-2026-10565",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open5GS NGAP Handover gmm-sm.c gmm_state_security_mode race condition",
    "summary": "A security flaw has been discovered in Open5GS up to 2.7.6. The impacted element is the function gmm_state_security_mode of the file src/amf/gmm-sm.c of the component NGAP Handover. Performing a manipulation results in race condition. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is regarded as difficult. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.",
    "evidence": "osv:CVE-2026-10565",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-10565",
      "aliases": [
        "CVE-2026-10565"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open5gs/open5gs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "83e35bb2de7e67646fdba849580184422b10006a"
                },
                {
                  "last_affected": "d9d3abdd480be96fac3bc8a997e83446648763ca"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.7.0"
                      },
                      {
                        "last_affected": "2.7.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.7.1"
                      },
                      {
                        "last_affected": "2.7.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.7.2"
                      },
                      {
                        "last_affected": "2.7.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.7.5"
                      },
                      {
                        "last_affected": "2.7.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.7.6"
                      },
                      {
                        "last_affected": "2.7.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "5GS"
                      },
                      {
                        "last_affected": "2.7.6"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.7.0",
            "2.7.1",
            "2.7.2",
            "2.7.5",
            "2.7.6",
            "v2.7.6",
            "v2.7.5",
            "v2.7.2",
            "v2.7.1",
            "v2.7.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10565.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.961721325Z",
      "provider": "osv",
      "references": [
        "https://github.com/open5gs/open5gs/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10565.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-10565",
        "https://vuldb.com/cve/CVE-2026-10565",
        "https://vuldb.com/submit/818938",
        "https://vuldb.com/vuln/367672",
        "https://github.com/open5gs/open5gs/issues/4497",
        "https://vuldb.com/vuln/367672/cti",
        "https://github.com/open5gs/open5gs/pull/4501",
        "https://github.com/user-attachments/files/27111025/N2-SMC-Concurrent.zip"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-362"
        ],
        "cna_assigner": "VulDB",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.7.3"
                  },
                  {
                    "last_affected": "2.7.3"
                  },
                  {
                    "introduced": "2.7.4"
                  },
                  {
                    "last_affected": "2.7.4"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10565.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-10565",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521776,
  "published_at": "2026-06-02T01:30:09.909+00:00"
}