{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "20260524"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "74215ae300b555928332e03152dfcdc898f96ca6"
            }
          ],
          "repo": "https://github.com/schismtracker/schismtracker",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112007.json"
  },
  "details": "Schism Tracker through 20260524 contains a heap out-of-bounds write vulnerability in fmt_ult_load_song() in fmt/ult.c that fails to clamp the one-byte sample count to MAX_SAMPLES. Attackers can supply a crafted .ult module that overwrites the instruments pointer array, causing csf_destroy() to free attacker-chosen pointers and crash the application.",
  "id": "CVE-2026-112007",
  "modified": "2026-10-20T02:30:22.987298119Z",
  "published": "2026-10-18T11:38:30.590Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112007.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/schismtracker/schismtracker"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/schismtracker/schismtracker/blob/74215ae300b555928332e03152dfcdc898f96ca6/fmt/ult.c#L319-L330"
    },
    {
      "type": "EVIDENCE",
      "url": "https://hackmd.io/@haindpwn/schismtracker-ult-sample-count-oob-write"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112007"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/schism-tracker-through-20260524-heap-out-of-bounds-write-via-ult-loader"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Schism Tracker through 20260524 Heap Out-of-Bounds Write via ULT Loader"
}