Math Issue in No-Chicken/Echo-Mate

{
  "id": "9b9ca563961bcef0d2642e179cd9cc1b2d481f7ed3575898fd713f23595d5f0c",
  "url": "https://osv.dev/vulnerability/CVE-2026-4736",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Math Issue in No-Chicken/Echo-Mate",
    "summary": "Improper Handling of Values vulnerability in No-Chicken Echo-Mate (SDK/rv1106-sdk/sysdrv/source/kernel/include/net/netfilter modules). This vulnerability is associated with program files nf_tables.H‎, nft_byteorder.C‎, nft_meta.C‎. This issue affects Echo-Mate: before V250329.",
    "evidence": "osv:CVE-2026-4736",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-4736",
      "aliases": [
        "CVE-2026-4736"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/S:N/AU:N/R:U/V:D/RE:L/U:Amber"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/no-chicken/echo-mate",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d4df83ce5756e254e035ca3223907d5af551bde1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "V250329"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "250329"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4736.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.822525942Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4736.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-4736",
        "https://github.com/No-Chicken/Echo-Mate/pull/8",
        "https://github.com/No-Chicken/Echo-Mate"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-229"
        ],
        "cna_assigner": "GovTech CSG",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4736.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-4736",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496689,
  "published_at": "2026-03-24T03:11:16.951+00:00"
}