CVE-2026-45812 Details
Description
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.
A buffer size calculation vulnerability has been identified in Apache NimBLE versions through 1.9.0. This issue arises when the Legacy Advertising Report HCI event contains multiple bundled reports. NimBLE incorrectly calculates the offset to the next report, which can lead the host to read past the end of the buffer. As a result, a GAP event may be delivered to the application with invalid data. This vulnerability is of low severity, as it only occurs when NimBLE's host is paired with a third-party controller that batches multiple reports into one event.
Users are advised to upgrade to Apache NimBLE version 1.10.0, which addresses this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/07/24/12 | CVE | Mailing ListThird Party Advisory |
| https://github.com/apache/mynewt-nimble/commit/605c7585408bc3674818eeb7b6f478a8aefe9746 | [email protected] | Patch |
| https://lists.apache.org/thread/rll5m1ly2vg8jr76lp5ohrtspr5vlofy | [email protected] | Mailing ListVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-131 | Incorrect Calculation of Buffer Size | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache nimble | < 1.10.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 27, 2026 | Initial Analysis | [email protected] |
| Jul 24, 2026 | CVE Modified | CISA-ADP |
| Jul 24, 2026 | CVE Modified | CVE |
| Jul 24, 2026 | New CVE Received | [email protected] |