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CVE-2026-81507 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/espressif/esp-idf/commit/14c99559b4337cabcf0f09c21d16b93c4cd7a6fe	[email protected]
https://github.com/espressif/esp-idf/commit/1e07f6d83ca892630a7210df2958455f7ca77b4a	[email protected]
https://github.com/espressif/esp-idf/commit/5731c63ece128f156939b9f734256e2227c1442a	[email protected]
https://github.com/espressif/esp-idf/commit/8de265dc44b1b22c749ea44ee7c609b3da4162f0	[email protected]
https://github.com/espressif/esp-idf/commit/9a6d04f65e0e341e7d72bd417c9f31b8a04ce846	[email protected]
https://github.com/espressif/esp-idf/commit/c2610255a5adce651ca582bb82368c3dd0ee2834	[email protected]
https://github.com/espressif/esp-idf/commit/c8cd8f4f3019ae2f912c8cbe9974445e8d9b8749	[email protected]
https://github.com/espressif/esp-idf/releases/tag/v5.2.8	[email protected]
https://github.com/espressif/esp-idf/releases/tag/v5.3.6	[email protected]
https://github.com/espressif/esp-idf/releases/tag/v5.5.5	[email protected]
https://github.com/espressif/esp-idf/releases/tag/v6.0.3	[email protected]
https://github.com/espressif/esp-idf/releases/tag/v6.1-rc1	[email protected]
https://github.com/espressif/esp-idf/security/advisories/GHSA-v335-fxwc-rc44	[email protected]

see all 13 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-125	Out-of-bounds Read	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 14, 2026	CVE Modified	CISA-ADP
Oct 13, 2026	New CVE Received	[email protected]