CVE-2026-45811: Apache NimBLE: Buffer overflow in socket HCI transport
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Apache NimBLE. The HCI socket transport did not check whether a received HCI event would fit the configured event pool before copying it, allowing a buffer overflow. Severity is low: exploitation requires either a misconfigured pool size or a malicious/compromised controller on the other end of the HCI socket link, not over-the-air Bluetooth access.
This issue affects Apache NimBLE: through 1.9.0.
Users are recommended to upgrade to version 1.10.0, which fixes the issue.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45811?
The severity of CVE-2026-45811 is high with a CVSS score of 7.5.
What type of vulnerability is associated with CVE-2026-45811?
CVE-2026-45811 is a buffer overflow vulnerability in the Apache NimBLE HCI socket transport.
How do I fix CVE-2026-45811?
You can fix CVE-2026-45811 by applying the available patch provided by Apache.
What are the potential impacts of CVE-2026-45811?
The potential impacts of CVE-2026-45811 include application crashes and unauthorized access due to the buffer overflow.
Which software is affected by CVE-2026-45811?
CVE-2026-45811 affects the Apache NimBLE software.