---
id: CVE-2021-42252
title: >-
  An issue was discovered in aspeed_lpc_ctrl_mmap in
  drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6
summary: >-
  An issue was discovered in aspeed_lpc_ctrl_mmap in
  drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local
  attackers able to access the Aspeed LPC control interface could overwrite
  memory in the kernel and potential…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: netapp
product: cloud_backup
affected:
  - cloud_backup
  - 'linux_kernel >= 4.12, < 4.14.247'
  - 'linux_kernel >= 4.15, < 4.19.207'
  - 'linux_kernel >= 4.20, < 5.4.148'
  - 'linux_kernel >= 5.5, < 5.10.67'
  - 'linux_kernel >= 5.11, < 5.13.19'
  - 'linux_kernel >= 5.14, < 5.14.6'
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h300e_firmware
  - h500e_firmware
  - h700e_firmware
  - h410s_firmware
  - h410c_firmware
  - solidfire_baseboard_management_controller_firmware
patched:
  - linux_kernel 5.14.6
published: '2021-10-11'
updated: '2026-08-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-42252'
references:
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6'
    label: cve@mitre.org
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20211112-0006/'
    label: cve@mitre.org
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20211112-0006/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0037
epssPercentile: 0.28202
ingestedAt: '2026-08-05T18:50:24.911Z'
---

## Overview

An issue was discovered in aspeed_lpc_ctrl_mmap in drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local attackers able to access the Aspeed LPC control interface could overwrite memory in the kernel and potentially execute privileges, aka CID-b49a0e69a7b1. This occurs because a certain comparison uses values that are not memory sizes.

## Affected

- `cloud_backup`
- `linux_kernel >= 4.12, < 4.14.247`
- `linux_kernel >= 4.15, < 4.19.207`
- `linux_kernel >= 4.20, < 5.4.148`
- `linux_kernel >= 5.5, < 5.10.67`
- `linux_kernel >= 5.11, < 5.13.19`
- `linux_kernel >= 5.14, < 5.14.6`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h300e_firmware`
- `h500e_firmware`
- `h700e_firmware`
- `h410s_firmware`
- `h410c_firmware`
- `solidfire_baseboard_management_controller_firmware`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.14.6`