ESF-IDF's ESP32 Bluetooth Controller Has an Invalid Access Address Vulnerability
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. When the ESP32 is in advertising mode, if it receives a connection request containing an invalid Access Address (AA) of 0x00000000 or 0xFFFFFFFF, advertising may stop unexpectedly. In this case, the controller may incorrectly report a connection event to the host, which can cause the application layer to assume that the device has successfully established a connection. This issue has been fixed in versions 5.5.2, 5.4.3, 5.3.5, 5.2.6, and 5.1.7. At time of publication versions 5.5.2, 5.3.5, and 5.1.7 have not been released but are fixed respectively in commits 3b95b50, e3d7042, and 75967b5.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| espressif | esp-idf | 5.5-beta1 to before 5.5.2; 5.4-beta1 to before 5.4.3; 5.3-beta1 to before 5.3.5; 5.2-beta1 to before 5.2.6; before 5.1.7 | 5.5.2, 5.4.3, 5.3.5, 5.2.6, 5.1.7 | Patch available | CNA |
- esp-idf Vendorespressif Affected 5.5-beta1 to before 5.5.2; 5.4-beta1 to before 5.4.3; 5.3-beta1 to before 5.3.5; 5.2-beta1 to before 5.2.6; before 5.1.7 Fixed in 5.5.2, 5.4.3, 5.3.5, 5.2.6, 5.1.7 Patch available CNA
Remediation
- Fix · CNA esp-idf (espressif) Fixed in 5.5.2, 5.4.3, 5.3.5, 5.2.6, 5.1.7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-64342
References
Other 7
- https://github.com/espressif/esp-idf/security/advisories/GHSA-8mg7-9qpg-p92v
- https://github.com/espressif/esp-idf/commit/309f031dd6b04de30c926a256508c65b0df95dfa
- https://github.com/espressif/esp-idf/commit/3b95b50703cd3301a370cffaa1cc299b1941fe2a
- https://github.com/espressif/esp-idf/commit/75967b578563ea7876dc215251cbb6d64bc9d768
- https://github.com/espressif/esp-idf/commit/8ec541023684d33b498fa21c5b4724bce748aa7b
- https://github.com/espressif/esp-idf/commit/bf66761962579f73aea682d1154b9c99b9d3d7dc
- https://github.com/espressif/esp-idf/commit/e3d70429566ece1ef593d36aa4ebd320e0c95925
More espressif vulnerabilities
- TI-2026-31061 arduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCE CVSS 3.1CRITICAL 9.8
- TI-2024-30765 Multiple Poisoned Pipeline Execution (PPE) vulnerabilities CVSS 3.1CRITICAL 10.0
- TI-2026-30028 Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption CVSS 3.1HIGH 8.8
- TI-2025-33484 CSRF Vulnerability in Firmware Update Endpoints Allows Remote Code Execution CVSS 4.0HIGH 8.7
- TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
- TI-2025-33011 arduino-esp32 vulnerable to CRLF injection in WebServer.cpp CVSS 4.0HIGH 8.9
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences