CVE-2026-81507 (GCVE-0-2026-81507)
Vulnerability from cvelistv5
Published
2026-10-13 15:12
Modified
2026-10-14 15:00
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
Summary
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. Prior to 5.2.8, 5.3.6, 5.5.5, 6.0.3, and 6.1-rc1, ESP-IDF BlueDroid L2CAP configuration-option processing in l2c_main.c and l2c_utils.c does not consistently validate option lengths against the remaining received packet bytes. A remote unauthenticated BR/EDR peer within radio range can send a malformed L2CAP configuration request that causes an out-of-bounds read, and under some runtime conditions limited adjacent Bluetooth stack memory can be included in an outbound L2CAP Configuration Response. The issue affects ESP32-class products using the BlueDroid host stack with Classic Bluetooth enabled. This issue is fixed in 5.2.8, 5.3.6, 5.5.5, 6.0.3, and 6.1-rc1.
References
Impacted products
Vendor Product Version
espressif esp-idf Version: < 5.2.8
Version: >= 5.3-beta1, < 5.3.6
Version: >= 5.4-beta1, < 5.5.5
Version: >= 6.0-beta1, < 6.0.3
Version: >= 6.1-beta1, < 6.1-rc1
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                "id": "CVE-2026-81507",
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      "source": {
        "advisory": "GHSA-v335-fxwc-rc44",
        "discovery": "UNKNOWN"
      },
      "title": "ESF-IDF: Bluetooth Classic L2CAP Heap Memory Disclosure Allowing Unauthorized Access to Sensitive Data"
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}


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