{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:espressif:esp-idf:5.2.6:*:*:*:*:*:*:*",
              "cpe:2.3:a:espressif:esp-idf:5.3.5:*:*:*:*:*:*:*",
              "cpe:2.3:a:espressif:esp-idf:5.4.4:*:*:*:*:*:*:*",
              "cpe:2.3:a:espressif:esp-idf:5.5.4:*:*:*:*:*:*:*",
              "cpe:2.3:a:espressif:esp-idf:6.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "5.2.6"
              },
              {
                "last_affected": "5.2.6"
              },
              {
                "introduced": "5.3.5"
              },
              {
                "last_affected": "5.3.5"
              },
              {
                "introduced": "5.4.4"
              },
              {
                "last_affected": "5.4.4"
              },
              {
                "introduced": "5.5.4"
              },
              {
                "last_affected": "5.5.4"
              },
              {
                "introduced": "6.0"
              },
              {
                "last_affected": "6.0"
              }
            ],
            "source": [
              "CPE_STRING",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "9ef24e3e2a2c96e720d83c574a3f8699177573da"
            },
            {
              "fixed": "0ea58d79845ad674d0358d5de246015a68c4cb4f"
            },
            {
              "fixed": "56c3e385611e63162d0f2f8504ac4ae2ccfccef0"
            },
            {
              "fixed": "71eb2dbe6aaef830719ecac8edf409e2992b64b2"
            },
            {
              "fixed": "9b4cacf9cbc69379972de6a2247fcf5af9240961"
            },
            {
              "fixed": "a2f4554f10ba075c98cbc67464db096ba32497cf"
            },
            {
              "fixed": "f5d24a7e919bc5f447091479656b86da6762a103"
            }
          ],
          "repo": "https://github.com/espressif/esp-idf",
          "type": "GIT"
        }
      ],
      "versions": [
        "5.2.6",
        "5.3.5",
        "5.4.4",
        "5.5.4",
        "6.0",
        "= 5.2.6",
        "= 5.3.5",
        "= 5.4.4",
        "= 5.5.4",
        "= 6.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-9r76-858f-v6jh"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45542.json"
  },
  "details": "ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a heap buffer overflow exists in the Security Scheme 2 (SRP6a) session-setup path of the protocomm component. The first-phase handler (handle_session_command0() in components/protocomm/src/security/security2.c) trusts the length of a client-supplied protobuf field for the SRP6a username and copies it into a buffer whose size is derived from a narrower destination type. The resulting truncation-versus-copy asymmetry corrupts the heap when an oversized value is supplied. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.",
  "id": "CVE-2026-45542",
  "modified": "2026-07-08T05:36:58.431920231Z",
  "published": "2026-06-10T00:34:53.238Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45542.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45542"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4cb4f"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfccef0"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b64b2"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af9240961"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba32497cf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762a103"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth"
}