---
id: CVE-2026-90271
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt

  If a user unbinds an MSC after mpam_disable() has been run in response
  to an error inter…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt

  If a user unbinds an MSC after mpam_disable() has been run in response
  to an error inter…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f04046f2577a5c76167333ca99d3903ee5331ba0 <
    a29044c9c83513c7463de2adb84c169685562ad2
  - >-
    Linux >= f04046f2577a5c76167333ca99d3903ee5331ba0 <
    fc996c39689bb15aa80e5366809434f7258fb703
  - Linux 6.19
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:23.677'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90271'
references:
  - url: 'https://git.kernel.org/stable/c/a29044c9c83513c7463de2adb84c169685562ad2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc996c39689bb15aa80e5366809434f7258fb703'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.837Z'
epss: 0.00198
epssPercentile: 0.08522
---

## Overview

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

arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt

If a user unbinds an MSC after mpam_disable() has been run in response
to an error interrupt then a dereference of a NULL pointer occurs as
mpam_disable() sets the drvdata to NULL. Add an early return to the driver
remove callback to avoid this.

## Remediation

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