---
id: CVE-2025-21802
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: hns3: fix oops when unload drivers paralleling

  When unload hclge driver, it tries to disable sriov first for each
  ae_dev node from hnae3_ae_dev_list
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: hns3: fix oops when unload drivers paralleling

  When unload hclge driver, it tries to disable sriov first for each
  ae_dev node from hnae3_ae_dev_list. If user unlo…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.19.214, < 4.20'
  - 'linux_kernel >= 5.4.156, < 5.5'
  - 'linux_kernel >= 5.10.76, < 5.10.235'
  - 'linux_kernel >= 5.14.15, < 5.15'
  - 'linux_kernel >= 5.15.1, < 5.15.179'
  - 'linux_kernel >= 5.16, < 6.1.129'
  - 'linux_kernel >= 6.2, < 6.6.76'
  - 'linux_kernel >= 6.7, < 6.12.13'
  - 'linux_kernel >= 6.13, < 6.13.2'
  - linux_kernel = 5.15
patched:
  - linux_kernel 6.13.2
published: '2025-02-27'
updated: '2026-07-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-21802'
references:
  - url: 'https://git.kernel.org/stable/c/622d92a67656e5c4d2d6ccac02d688ed995418c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/82736bb83fb0221319c85c2e9917d0189cd84e1e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8c640dd3d900cc8988a39c007591f1deee776df4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/92e5995773774a3e70257e9c95ea03518268bea5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b5a8bc47aa0a4aa8bca5466dfa2d12dbb5b3cd0c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cafe9a27e22736d4a01b3933e36225f9857c7988'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e876522659012ef2e73834a0b9f1cbe3f74d5fad'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00205
epssPercentile: 0.10811
ingestedAt: '2026-07-14T13:36:55.772Z'
---

## Overview

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

net: hns3: fix oops when unload drivers paralleling

When unload hclge driver, it tries to disable sriov first for each
ae_dev node from hnae3_ae_dev_list. If user unloads hns3 driver at
the time, because it removes all the ae_dev nodes, and it may cause
oops.

But we can't simply use hnae3_common_lock for this. Because in the
process flow of pci_disable_sriov(), it will trigger the remove flow
of VF, which will also take hnae3_common_lock.

To fixes it, introduce a new mutex to protect the unload process.

## Affected

- `linux_kernel >= 4.19.214, < 4.20`
- `linux_kernel >= 5.4.156, < 5.5`
- `linux_kernel >= 5.10.76, < 5.10.235`
- `linux_kernel >= 5.14.15, < 5.15`
- `linux_kernel >= 5.15.1, < 5.15.179`
- `linux_kernel >= 5.16, < 6.1.129`
- `linux_kernel >= 6.2, < 6.6.76`
- `linux_kernel >= 6.7, < 6.12.13`
- `linux_kernel >= 6.13, < 6.13.2`
- `linux_kernel = 5.15`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.13.2`