CVE-2025-53477 Apache Mynewt NimBLE: NULL Pointer Dereference in NimBLE host HCI layer
A missing validation in the HCI layer can cause a crash if asserts are disabled and the Bluetooth controller is broken.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-53477?
CVE-2025-53477 is a high-severity vulnerability in Apache Mynewt NimBLE, published on 10 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2025-53477?
It affects 1 product.
Products include Apache Nimble.
How do I fix CVE-2025-53477?
No fix has been published for CVE-2025-53477 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-53477 being exploited?
There is no known exploitation of CVE-2025-53477 in the wild and no public exploit code.
Other vulnerabilities in Apache Mynewt NimBLE
- CVE-2026-45813 Apache NimBLE: Incorrect data validation in BASS add/modify source operation
- CVE-2025-62235 Apache Mynewt NimBLE: Incorrect handling of SMP Security Request could lead to undesirable pairing
- CVE-2026-45811 Apache NimBLE: Buffer overflow in socket HCI transport
- CVE-2026-45815 Apache NimBLE: Remote reachable assertion in ATT Read Multiple Variable Response handler
- CVE-2026-45816 Apache NimBLE: NULL pointer dereference vulnerability in SMP LTK request
Sources
Also known as GHSA-6phw-p8vc-q8gp.