---
id: CVE-2025-38272
title: 'net: dsa: b53: do not enable EEE on bcm63xx'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: dsa: b53: do not enable EEE on bcm63xx

  BCM63xx internal switches do not support EEE, but provide multiple RGMII
  ports where external PHYs may be connected. If one…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 <
    3f87fe8ceaa775a5b0ed02802146c1f4743998fb
  - >-
    Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 <
    155bc8f94d52c01c0952acee8156f05f26d81ef6
  - >-
    Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 <
    3fbe3f4c57fda09f32e13fa05f53a0cc6f500619
  - >-
    Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 <
    2dbccf1eb8c04b84ee3afdb1d6b787db02e7befc
  - >-
    Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 <
    1237c2d4a8db79dfd4369bff6930b0e385ed7d5c
  - Linux 4.15
published: '2025-07-10'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:21:53.195Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38272'
references:
  - url: 'https://git.kernel.org/stable/c/3f87fe8ceaa775a5b0ed02802146c1f4743998fb'
  - url: 'https://git.kernel.org/stable/c/155bc8f94d52c01c0952acee8156f05f26d81ef6'
  - url: 'https://git.kernel.org/stable/c/3fbe3f4c57fda09f32e13fa05f53a0cc6f500619'
  - url: 'https://git.kernel.org/stable/c/2dbccf1eb8c04b84ee3afdb1d6b787db02e7befc'
  - url: 'https://git.kernel.org/stable/c/1237c2d4a8db79dfd4369bff6930b0e385ed7d5c'
tags:
  - cve.org
epss: 0.00225
epssPercentile: 0.1322
ingestedAt: '2026-10-21T12:48:53.704Z'
---

## Overview

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

net: dsa: b53: do not enable EEE on bcm63xx

BCM63xx internal switches do not support EEE, but provide multiple RGMII
ports where external PHYs may be connected. If one of these PHYs are EEE
capable, we may try to enable EEE for the MACs, which then hangs the
system on access of the (non-existent) EEE registers.

Fix this by checking if the switch actually supports EEE before
attempting to configure it.

## Affected

- `Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 < 3f87fe8ceaa775a5b0ed02802146c1f4743998fb`
- `Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 < 155bc8f94d52c01c0952acee8156f05f26d81ef6`
- `Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 < 3fbe3f4c57fda09f32e13fa05f53a0cc6f500619`
- `Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 < 2dbccf1eb8c04b84ee3afdb1d6b787db02e7befc`
- `Linux >= 22256b0afb12333571ad11799fa68fd27e4f4e80 < 1237c2d4a8db79dfd4369bff6930b0e385ed7d5c`
- `Linux 4.15`

## Remediation

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