---
id: CVE-2022-32981
title: >-
  An issue was discovered in the Linux kernel through 5.18.3 on powerpc 32-bit
  platforms
summary: >-
  An issue was discovered in the Linux kernel through 5.18.3 on powerpc 32-bit
  platforms. There is a buffer overflow in ptrace PEEKUSER and POKEUSER (aka
  PEEKUSR and POKEUSR) when accessing floating point registers.
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'
cwe:
  - CWE-120
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 3.13, < 4.9.318'
  - 'linux_kernel >= 4.10, < 4.14.283'
  - 'linux_kernel >= 4.15, < 4.19.247'
  - 'linux_kernel >= 4.20, < 5.4.198'
  - 'linux_kernel >= 5.5, < 5.10.122'
  - 'linux_kernel >= 5.11, < 5.15.47'
  - 'linux_kernel >= 5.16.0, < 5.17.15'
  - 'linux_kernel >= 5.18, < 5.18.4'
  - linux_kernel = 5.19
patched:
  - linux_kernel 5.18.4
published: '2022-06-10'
updated: '2026-08-26'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-32981'
references:
  - url: 'http://www.openwall.com/lists/oss-security/2022/06/14/3'
    label: cve@mitre.org
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=8e1278444446fc97778a5e5c99bca1ce0bbc5ec9
    label: cve@mitre.org
  - url: 'http://www.openwall.com/lists/oss-security/2022/06/14/3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=8e1278444446fc97778a5e5c99bca1ce0bbc5ec9
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - exploit-available
epss: 0.00962
epssPercentile: 0.6009
ingestedAt: '2026-08-26T18:47:53.673Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/SpiralBL0CK/CVE-2022-32981'
  checkedAt: '2026-09-27T10:33:27.545Z'
exploitAvailable: true
---

## Overview

An issue was discovered in the Linux kernel through 5.18.3 on powerpc 32-bit platforms. There is a buffer overflow in ptrace PEEKUSER and POKEUSER (aka PEEKUSR and POKEUSR) when accessing floating point registers.

## Affected

- `linux_kernel >= 3.13, < 4.9.318`
- `linux_kernel >= 4.10, < 4.14.283`
- `linux_kernel >= 4.15, < 4.19.247`
- `linux_kernel >= 4.20, < 5.4.198`
- `linux_kernel >= 5.5, < 5.10.122`
- `linux_kernel >= 5.11, < 5.15.47`
- `linux_kernel >= 5.16.0, < 5.17.15`
- `linux_kernel >= 5.18, < 5.18.4`
- `linux_kernel = 5.19`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.18.4`