CVE-2026-45812: Apache NimBLE: OOB Read via sizeof(pointer) in Legacy Advertising Report Handler
Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event.
When a single HCI advertising report event bundles multiple reports, NimBLE miscalculated the offset to the next report. This can cause the host to read past the end of the buffer and deliver a GAP event with bogus data to the application.
Severity is low: NimBLE's own controller never batches multiple reports into one event, so this only matters when NimBLE's host is paired with a third-party controller that does.
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
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Apache NimBLEto a version that resolves this vulnerability.Fixed in 1.10.0Patch CVE-2026-45812
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45812?
The severity of CVE-2026-45812 is medium with a CVSS score of 6.5.
How do I fix CVE-2026-45812?
To fix CVE-2026-45812, update to the latest version of Apache NimBLE that addresses the buffer size calculation issue.
What type of vulnerability is CVE-2026-45812?
CVE-2026-45812 is classified as a buffer overflow vulnerability due to incorrect calculation of buffer sizes.
What are the consequences of exploiting CVE-2026-45812?
Exploiting CVE-2026-45812 could allow an attacker to read beyond the intended buffer, potentially disclosing sensitive information.
On which software is CVE-2026-45812 found?
CVE-2026-45812 is found in Apache NimBLE when handling Legacy Advertising Report HCI events.