---
id: CVE-2025-9558
title: >-
  There is a potential OOB Write vulnerability in the gen_prov_start function in
  pb_adv.c
summary: >-
  There is a potential OOB Write vulnerability in the gen_prov_start function in
  pb_adv.c. The full length of the received data is copied into the link.rx.buf
  receiver buffer without any validation on the data size.
severity: high
cvss: 7.6
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H'
cwe:
  - CWE-120
published: '2025-11-26'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T20:17:01.410'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-9558'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8wvr-688x-68vr
    label: vulnerabilities@zephyrproject.org
tags:
  - nvd
epss: 0.00189
epssPercentile: 0.07888
ingestedAt: '2026-10-13T20:53:44.535Z'
---

## Overview

There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.