Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Nimble | < 1.10.0 |
Related Weaknesses (CWE)
References
- https://github.com/apache/mynewt-nimble/commit/dcc4e4f026109eecd507de9479bb50193Patch
- https://lists.apache.org/thread/5mkz68y1py0o6zmxtc3l1o8grtrb78m0Mailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/07/24/11Mailing ListThird Party Advisory
FAQ
What is CVE-2026-45811?
CVE-2026-45811 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 even...
How severe is CVE-2026-45811?
CVE-2026-45811 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45811?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Nimble.