{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81507", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-26T20:58:58.083Z", "datePublished": "2026-10-13T15:12:01.010Z", "dateUpdated": "2026-10-13T15:12:01.010Z"}, "containers": {"cna": {"title": "ESF-IDF: Bluetooth Classic L2CAP Heap Memory Disclosure Allowing Unauthorized Access to Sensitive Data", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/espressif/esp-idf/security/advisories/GHSA-v335-fxwc-rc44", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/espressif/esp-idf/security/advisories/GHSA-v335-fxwc-rc44"}, {"name": "https://github.com/espressif/esp-idf/commit/14c99559b4337cabcf0f09c21d16b93c4cd7a6fe", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/14c99559b4337cabcf0f09c21d16b93c4cd7a6fe"}, {"name": "https://github.com/espressif/esp-idf/commit/1e07f6d83ca892630a7210df2958455f7ca77b4a", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/1e07f6d83ca892630a7210df2958455f7ca77b4a"}, {"name": "https://github.com/espressif/esp-idf/commit/5731c63ece128f156939b9f734256e2227c1442a", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/5731c63ece128f156939b9f734256e2227c1442a"}, {"name": "https://github.com/espressif/esp-idf/commit/8de265dc44b1b22c749ea44ee7c609b3da4162f0", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/8de265dc44b1b22c749ea44ee7c609b3da4162f0"}, {"name": "https://github.com/espressif/esp-idf/commit/9a6d04f65e0e341e7d72bd417c9f31b8a04ce846", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/9a6d04f65e0e341e7d72bd417c9f31b8a04ce846"}, {"name": "https://github.com/espressif/esp-idf/commit/c2610255a5adce651ca582bb82368c3dd0ee2834", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/c2610255a5adce651ca582bb82368c3dd0ee2834"}, {"name": "https://github.com/espressif/esp-idf/commit/c8cd8f4f3019ae2f912c8cbe9974445e8d9b8749", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/commit/c8cd8f4f3019ae2f912c8cbe9974445e8d9b8749"}, {"name": "https://github.com/espressif/esp-idf/releases/tag/v5.2.8", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/releases/tag/v5.2.8"}, {"name": "https://github.com/espressif/esp-idf/releases/tag/v5.3.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/releases/tag/v5.3.6"}, {"name": "https://github.com/espressif/esp-idf/releases/tag/v5.5.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/releases/tag/v5.5.5"}, {"name": "https://github.com/espressif/esp-idf/releases/tag/v6.0.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/releases/tag/v6.0.3"}, {"name": "https://github.com/espressif/esp-idf/releases/tag/v6.1-rc1", "tags": ["x_refsource_MISC"], "url": "https://github.com/espressif/esp-idf/releases/tag/v6.1-rc1"}], "affected": [{"vendor": "espressif", "product": "esp-idf", "versions": [{"version": "< 5.2.8", "status": "affected"}, {"version": ">= 5.3-beta1, < 5.3.6", "status": "affected"}, {"version": ">= 5.4-beta1, < 5.5.5", "status": "affected"}, {"version": ">= 6.0-beta1, < 6.0.3", "status": "affected"}, {"version": ">= 6.1-beta1, < 6.1-rc1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-13T15:12:01.010Z"}, "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."}], "source": {"advisory": "GHSA-v335-fxwc-rc44", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "esp-idf", "vendor": "espressif", "versions": [{"status": "affected", "version": "< 5.2.8"}, {"status": "affected", "version": ">= 5.3-beta1, < 5.3.6"}, {"status": "affected", "version": ">= 5.4-beta1, < 5.5.5"}, {"status": "affected", "version": ">= 6.0-beta1, < 6.0.3"}, {"status": "affected", "version": ">= 6.1-beta1, < 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": "2026-10-13T16:17:23.447", "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"}]}, "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": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.2.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.3-beta1,5.3.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4-beta1,5.5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.0-beta1,6.0.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1-beta1,6.1-rc1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "esp-idf", "source": "cna", "vendor": "espressif"}, "product": "esp-idf", "vendor": "espressif"}], "created": "2026-10-13T17:30:13.565033+00:00", "updated": "2026-10-13T17:30:14.010591+00:00", "vendors": ["espressif", "espressif$PRODUCT$esp-idf"]}