🛡️ CVE-2026-45811 — nimble

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-120 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-45811 is classified as CWE-120: Classic Buffer Overflow. Input is copied into a fixed-size buffer without a length check, overwriting memory past the end of it.

Affected software

CVE-2026-45811 is recorded against 1 package.

  • nimble (fixed in 1.10.0)

Timeline and source

Published on 24 July 2026 and last revised on 27 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
lists.apache.org
www.openwall.com

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-120
Public Exploit ✅ No
Source NVD
Published 2026-07-24
Updated 2026-08-11
Modified 2026-07-27

Affected Packages

Software From version Fixed in
nimble — 1.10.0

Similar Threats

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