FKIE_CVE-2026-81507
Vulnerability from fkie_nvd - Published: 2026-10-13 16:17 - Updated: 2026-10-16 16:00
Severity
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 |
|---|
{
"affected": [
{
"affectedData": [
{
"product": "esp-idf",
"vendor": "espressif",
"versions": [
{
"status": "affected",
"version": "\u003c 5.2.8"
},
{
"status": "affected",
"version": "\u003e= 5.3-beta1, \u003c 5.3.6"
},
{
"status": "affected",
"version": "\u003e= 5.4-beta1, \u003c 5.5.5"
},
{
"status": "affected",
"version": "\u003e= 6.0-beta1, \u003c 6.0.3"
},
{
"status": "affected",
"version": "\u003e= 6.1-beta1, \u003c 6.1-rc1"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"id": "CVE-2026-81507",
"lastModified": "2026-10-16T16:00:33.533",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "security-advisories@github.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-81507",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-14T15:00:21.832346Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-13T16:17:23.447",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/14c99559b4337cabcf0f09c21d16b93c4cd7a6fe"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/1e07f6d83ca892630a7210df2958455f7ca77b4a"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/5731c63ece128f156939b9f734256e2227c1442a"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/8de265dc44b1b22c749ea44ee7c609b3da4162f0"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/9a6d04f65e0e341e7d72bd417c9f31b8a04ce846"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/c2610255a5adce651ca582bb82368c3dd0ee2834"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/commit/c8cd8f4f3019ae2f912c8cbe9974445e8d9b8749"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/releases/tag/v5.2.8"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/releases/tag/v5.3.6"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/releases/tag/v5.5.5"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/releases/tag/v6.0.3"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/releases/tag/v6.1-rc1"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/espressif/esp-idf/security/advisories/GHSA-v335-fxwc-rc44"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
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