CVE-2026-45811 | Buffer Copy without Checking Size of Input ('Classic Buffer … | CVSS 7.5 HIGH

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.

Metadata

CVE ID: CVE-2026-45811
State: PUBLISHED
Assigner: apache
Reserved: 2026-05-13 08:48 UTC
Published: 2026-07-24 12:09 UTC
Last updated: 2026-07-24 18:14 UTC
Primary CWE: CWE-120
CWE-120 Buffer Copy without Checking Size of Input ('Classic…
Vendor / Product: Apache Software Foundation / Apache NimBLE
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Apache Software Foundation	Apache NimBLE	—	0 ≤ 1.9.0

Weakness (CWE)

CWE	Source	Description
CWE-120	cna	CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	adp	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References (2)