CVE-2026-45812CWE-131

Apache NimBLE: OOB Read via sizeof(pointer) in Legacy Advertising Report Handler

Medium · published July 24, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
52.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00694 · 52.4th percentile
Weakness
CWE-131 · Incorrect Calculation of Buffer Size
Published
2026-07-24T12:09Z
EPSS history
Timeline
  • 24 JUL 12:09Z
    Apache NimBLE: OOB Read via sizeof(pointer) in Legacy Advertising Report Handler
    cvelistv5