---
id: CVE-2025-38125
title: 'net: stmmac: make sure that ptp_rate is not 0 before configuring EST'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: stmmac: make sure that ptp_rate is not 0 before configuring EST

  If the ptp_rate recorded earlier in the driver happens to be 0, this
  bogus value will propagate up…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b <
    b15c9a21950e1af6d440ce5a8edfa8a94b9acb9b
  - >-
    Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b <
    d6b0f7ed3e9b6c5e2e3a006c8f72c95aa4ac4b74
  - >-
    Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b <
    b92ec4a848728460f181def33735605f154d438f
  - >-
    Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b <
    451ee661d0f6272017fa012f99617101aa8ddf2c
  - >-
    Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b <
    d5e3bfdba0dc419499b801937128957f77503761
  - >-
    Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b <
    cbefe2ffa7784525ec5d008ba87c7add19ec631a
  - Linux 5.6
published: '2025-07-03'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:41:43.127Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38125'
references:
  - url: 'https://git.kernel.org/stable/c/b15c9a21950e1af6d440ce5a8edfa8a94b9acb9b'
  - url: 'https://git.kernel.org/stable/c/d6b0f7ed3e9b6c5e2e3a006c8f72c95aa4ac4b74'
  - url: 'https://git.kernel.org/stable/c/b92ec4a848728460f181def33735605f154d438f'
  - url: 'https://git.kernel.org/stable/c/451ee661d0f6272017fa012f99617101aa8ddf2c'
  - url: 'https://git.kernel.org/stable/c/d5e3bfdba0dc419499b801937128957f77503761'
  - url: 'https://git.kernel.org/stable/c/cbefe2ffa7784525ec5d008ba87c7add19ec631a'
tags:
  - cve.org
epss: 0.00178
epssPercentile: 0.06591
ingestedAt: '2026-09-08T15:33:26.997Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

net: stmmac: make sure that ptp_rate is not 0 before configuring EST

If the ptp_rate recorded earlier in the driver happens to be 0, this
bogus value will propagate up to EST configuration, where it will
trigger a division by 0.

Prevent this division by 0 by adding the corresponding check and error
code.

## Affected

- `Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b < b15c9a21950e1af6d440ce5a8edfa8a94b9acb9b`
- `Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b < d6b0f7ed3e9b6c5e2e3a006c8f72c95aa4ac4b74`
- `Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b < b92ec4a848728460f181def33735605f154d438f`
- `Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b < 451ee661d0f6272017fa012f99617101aa8ddf2c`
- `Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b < d5e3bfdba0dc419499b801937128957f77503761`
- `Linux >= 8572aec3d0dc43045254fd1bf581fb980bfdbc4b < cbefe2ffa7784525ec5d008ba87c7add19ec631a`
- `Linux 5.6`

## Remediation

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