ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth_CVE-2026-45542

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-06-10T00:34:53.238Z",
    "modified": "2026-06-10T00:34:53.238Z",
    "type": "cve",
    "title": "ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth",
    "source": "GitHub_M",
    "references": "https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh\nhttps://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4cb4f\nhttps://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfccef0\nhttps://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b64b2\nhttps://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af9240961\nhttps://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba32497cf\nhttps://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762a103",
    "id": "CVE-2026-45542",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "espressif esp-idf = 5.2.6\nespressif esp-idf = 5.3.5\nespressif esp-idf = 5.4.4\nespressif esp-idf = 5.5.4\nespressif esp-idf = 6.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "esp-idf",
    "version": "= 5.2.6",
    "vendor": "espressif",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}