{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2026.07"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a897b0498f635654f091bf9f33e9696aa773e886"
            }
          ],
          "repo": "https://github.com/riot-os/riot",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8365-gj33-rgpf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-190",
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102692.json"
  },
  "details": "RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, nanocoap accepts oversized CoAP Block2 option values without enforcing the 20-bit maximum block number, allowing block offset multiplication to overflow on 32-bit targets. The affected master baseline is commit aeeae69e; the verified fix is later on master and remains unreleased. The oversized value passes from coap_get_blockopt() to coap_block_slicer_init(). A remote CoAP client can send a malformed Block2 option that produces an invalid slice range and can cause out-of-bounds memory access, denial of service, or memory corruption. This vulnerability is fixed in 2026.07.",
  "id": "CVE-2026-102692",
  "modified": "2026-10-17T10:30:37.361101471Z",
  "published": "2026-10-16T16:48:35.776Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102692.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RIOT-OS/RIOT/commit/6b283ace3565d931b3edff7e115d4f79339253b8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RIOT-OS/RIOT/commit/ee1fa0ef91874494823d476392572aeefdbc6b74"
    },
    {
      "type": "WEB",
      "url": "https://github.com/RIOT-OS/RIOT/releases/tag/2026.07"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-8365-gj33-rgpf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102692"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RIOT: Potential integer overflow in nanocoap Block2 handling leading to out-of-bounds memory access"
}