---
id: CVE-2026-89610
title: 'ntfs: verify run length exceeding volume boundary'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ntfs: verify run length exceeding volume boundary

  The mapping pairs decoder validates that the starting LCN is within the
  volume but does not check if the run extends …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    6e844d4b82434a781b80d02145fd1b17cf90e3c3
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    fea9e4488f384c0ef1c0e3d96b565127c1b98447
  - Linux < 7.2.4
  - Linux (all versions)
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:49:42.613Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89610'
references:
  - url: 'https://git.kernel.org/stable/c/6e844d4b82434a781b80d02145fd1b17cf90e3c3'
  - url: 'https://git.kernel.org/stable/c/fea9e4488f384c0ef1c0e3d96b565127c1b98447'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89610.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89610'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532418'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89610'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89610'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89610.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00553
epssPercentile: 0.46011
scores:
  cna: 9.8
  vendor: 5.5
ingestedAt: '2026-09-14T15:23:07.474Z'
---

## Overview

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

ntfs: verify run length exceeding volume boundary

The mapping pairs decoder validates that the starting LCN is within the
volume but does not check if the run extends beyond the volume boundary.

A malformed NTFS image with a crafted mapping pairs array could cause
the kernel to access memory beyond the volume boundary, potentially leading
to memory corruption and privilege escalation.

Add validation to ensure lcn + length stays within nr_clusters.

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6e844d4b82434a781b80d02145fd1b17cf90e3c3`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fea9e4488f384c0ef1c0e3d96b565127c1b98447`
- `Linux < 7.2.4`
- `Linux (all versions)`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89610.json)