Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Nimble | < 1.10.0 |
Related Weaknesses (CWE)
References
- https://github.com/apache/mynewt-nimble/commit/605c7585408bc3674818eeb7b6f478a8aPatch
- https://lists.apache.org/thread/rll5m1ly2vg8jr76lp5ohrtspr5vlofyMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/07/24/12Mailing ListThird Party Advisory
FAQ
What is CVE-2026-45812?
CVE-2026-45812 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 mi...
How severe is CVE-2026-45812?
CVE-2026-45812 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45812?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Nimble.