CVE-2026-45812 | Incorrect Calculation of Buffer Size vulnerability in Apache… | CVSS 6.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-45812
State: PUBLISHED
Assigner: apache
Reserved: 2026-05-13 08:56 UTC
Published: 2026-07-24 12:09 UTC
Last updated: 2026-07-24 18:16 UTC
Primary CWE: CWE-131
CWE-131 Incorrect Calculation of Buffer Size
Vendor / Product: Apache Software Foundation / Apache NimBLE
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

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

Weakness (CWE)

CWE	Source	Description
CWE-131	cna	CWE-131 Incorrect Calculation of Buffer Size

CVSS scores (1)

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

References (2)