---
id: CVE-2026-90134
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ntfs: fix kmap_local_page() usage in compress

  Several compressed I/O paths discard the address returned by
  kmap_local_page() and later access or unmap the page using p…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ntfs: fix kmap_local_page() usage in compress

  Several compressed I/O paths discard the address returned by
  kmap_local_page() and later access or unmap the page using p…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 495e90fa334828d4119061e2726af51d0a0fb4ed <
    950e2ecc7aec21af24b05bc661a097a81c670409
  - >-
    Linux >= 495e90fa334828d4119061e2726af51d0a0fb4ed <
    6e03fbd5f772ad24ea64f7632e4d0d73184787ca
  - Linux 7.1
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:05.950'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90134'
references:
  - url: 'https://git.kernel.org/stable/c/6e03fbd5f772ad24ea64f7632e4d0d73184787ca'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/950e2ecc7aec21af24b05bc661a097a81c670409'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.879Z'
epss: 0.00198
epssPercentile: 0.08539
---

## Overview

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

ntfs: fix kmap_local_page() usage in compress

Several compressed I/O paths discard the address returned by
kmap_local_page() and later access or unmap the page using page_address().
This is invalid for highmem pages, and local mappings must also be unmapped
using the address returned by kmap_local_page().

Map each destination page in ntfs_decompress() only while producing the
current sub-block. Use memcpy_from_page(), memcpy_to_page(), and
memzero_page() for the other page accesses. Remove unnecessary local
mappings from ntfs_write_cb(), where pages are accessed through the vmap()
mapping.

## Remediation

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