An out of bounds write due to a missing bounds check in neka-nat/cupoch

{
  "id": "eb63b2b5303c15d7cac52c26c70f8525daa2185c7b435d72e826ef5e16243a50",
  "url": "https://osv.dev/vulnerability/CVE-2026-24797",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "An out of bounds write due to a missing bounds check in neka-nat/cupoch",
    "summary": "Out-of-bounds Write vulnerability in neka-nat cupoch (third_party/libjpeg-turbo/libjpeg-turbo modules). This vulnerability is associated with program files tjbench.C. This issue affects cupoch.",
    "evidence": "osv:CVE-2026-24797",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-24797",
      "aliases": [
        "CVE-2026-24797"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/AU:Y/R:A/RE:M/U:Amber"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/neka-nat/cupoch",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "17a8f13e9355e7634a8155b211f8ba1dd53dfefc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "v0.2.11.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.2.10.0",
            "v0.2.9.0",
            "v0.2.8.1",
            "v0.2.8.0",
            "v0.2.7.3",
            "v0.2.7.2",
            "v0.2.7.1",
            "v0.2.7",
            "v0.2.6",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.9.1",
            "v0.1.9",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-24797.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.157720227Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24797.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-24797",
        "https://github.com/neka-nat/cupoch/pull/138",
        "https://github.com/neka-nat/cupoch"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-787"
        ],
        "cna_assigner": "GovTech CSG",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24797.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-24797",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489590,
  "published_at": "2026-01-27T08:25:17.496+00:00"
}