High · 7.5 CVE-2025-53477 EUVD-2026-1853GHSA-6phw-p8vc-q8gp

Apache Mynewt NimBLE: NULL Pointer Dereference in NimBLE host HCI layer

Published Jan 10, 2026 · Updated Jan 12, 2026 · Assigned by apache

Vendor: Apache Software Foundation Product: Apache Mynewt NimBLE

Description

NULL Pointer Dereference vulnerability in Apache Nimble.

Missing validation of HCI connection complete or HCI command TX buffer could lead to NULL pointer dereference.
This issue requires disabled asserts and broken or bogus Bluetooth controller and thus severity is considered low.

This issue affects Apache NimBLE: through 1.8.0.

Users are recommended to upgrade to version 1.9.0, which fixes the issue.

Affected products

Vendor	Product	Affected	Fixed
Apache Software Foundation	Apache Mynewt NimBLE	≤ 1.8.0	—

References

https://github.com/apache/mynewt-nimble/commit/0caf9baeb271ede85fcc5237ab87ddbf938600da patch
https://github.com/apache/mynewt-nimble/commit/3160b8c4c7ff8db4e0f9badcdf7df684b151e077 patch
https://lists.apache.org/thread/1dxthc132hwm2tzvjblrtnschcsbw2vo vendor-advisory