{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "1.4.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "1.5.0"
                  },
                  {
                    "fixed": "1.5.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "1.6.0"
                  },
                  {
                    "fixed": "1.6.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "92e503566c990269f85ee15370d88415ad7ff6fb"
            },
            {
              "introduced": "61a7a53bea5b5bc4724646abbce601fd26c364b6"
            },
            {
              "fixed": "d2468d56de3d156659a9051c95119e3a6e11c421"
            },
            {
              "introduced": "9bc3cfa07aab98852de432fa24079f4b4b6b7eed"
            },
            {
              "fixed": "7a53f0a72a92de1621d30fc63703a29afe12bfaf"
            }
          ],
          "repo": "https://github.com/bacnet-stack/bacnet-stack",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gr74-333w-7wg8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97692.json"
  },
  "details": "BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.6, 1.5.2, and 1.6.1, the BACnet/SC message decoder walks the header-option list by following each option's MORE bit. Nothing rejects a list whose last option still has the MORE bit set, and the decode walk has no upper bound on how many options it processes. A single crafted BVLC-SC frame makes the walk advance one option past the end of the message and read message[message_len], one byte out of bounds. When the bytes after the message carry more MORE-set option markers, the walk keeps going: it runs past the fixed 4-entry option array and writes decoded option fields out of bounds. On the server that decode array is the static global bsc_dm, so the out-of-bounds write lands in adjacent BSS. Both faults are reachable before authentication, from the first frame a peer sends on a BACnet/SC connection, and the bytes that follow the message are the same peer's prior-frame data. This issue has been patched in versions 1.4.6, 1.5.2, 1.6.1, and 1.7.0.",
  "id": "CVE-2026-97692",
  "modified": "2026-11-14T10:30:39.894491898Z",
  "published": "2026-11-13T18:42:41.703Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97692.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bacnet-stack/bacnet-stack/pull/1435"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-gr74-333w-7wg8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97692"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "BACnet Stack: pre-auth out-of-bounds read that escalates to an out-of-bounds write into global memory"
}