CVE-2026-45816 Apache NimBLE: NULL pointer dereference vulnerability in SMP LTK request
A NULL pointer dereference in Apache NimBLE can cause a denial of service when asserts are disabled and a misbehaving controller is present.
- 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-2026-45816?
CVE-2026-45816 is a high-severity vulnerability in Apache NimBLE, published on 24 Jul 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 in LE Long Term Key Request event.
This requires disabled asserts (otherwise assert would trigger before NULL dereference) and bogus (or misbehaving) controller, thus severity is low.
This issue affects Apache NimBLE: through 1.9.0.
Users are recommended to upgrade to version 1.10.0, which fixes the issue.
Weakness: CWE-476
Which versions are affected by CVE-2026-45816?
It affects 1 product.
Products include Apache Nimble.
How do I fix CVE-2026-45816?
No fix has been published for CVE-2026-45816 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45816 being exploited?
There is no known exploitation of CVE-2026-45816 in the wild and no public exploit code.
Other vulnerabilities in Apache 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-2025-52435 Apache Mynewt NimBLE: Invalid error handling in pause encryption procedure in NimBLE controller
Sources
Also known as GHSA-r25p-7q83-xfq4.