SB2026090793 - Out-of-bounds read in ESP-IDF

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-81507)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in BlueDroid L2CAP configuration-option processing in l2c_main.c and l2c_utils.c when processing a malformed L2CAP configuration request. A remote attacker can send a malformed L2CAP configuration request to disclose sensitive information.

Exploitation occurs during L2CAP channel configuration without authentication or encryption.

Remediation

Install update from vendor's website.

References

• https://github.com/espressif/esp-idf/security/advisories/GHSA-v335-fxwc-rc44
• https://github.com/espressif/esp-idf/commit/c8cd8f4f3019ae2f912c8cbe9974445e8d9b8749