---
id: CVE-2026-89615
title: 'kernel: fs/ntfs3: bound page_lcns[] index by the log record (CVE-2026-89615)'
summary: >-
  A flaw was found in the Linux kernel's NTFS3 file system driver. A local
  attacker could exploit this by providing a specially crafted log record. This
  crafted record causes a buffer overflow in the page_lcns[] array, leading to
  memory corr…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-787
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    31fdd11f75da9823500168cecb07aa45130915a3
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    bb742d1030864c0fe140666f639428ba4e90b2ca
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    61ca8cbbf68f77f25b699ed4358bd232f94ed43b
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    f4c1bc6d7331f344ffcea93c2a37badcbe15baa6
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    7ccb94901f38a062034b56b43c774050b113758f
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    1135ebc225996b3ac1a295652b19a0a706737a6c
  - >-
    Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 <
    6f7b9dbdc1b7520206abce0049bdd143eb536e75
  - Linux 5.15
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T22:34:42+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89615.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89615.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89615'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532402'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89615'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89615'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89615.mbox
  - url: 'https://git.kernel.org/stable/c/31fdd11f75da9823500168cecb07aa45130915a3'
  - url: 'https://git.kernel.org/stable/c/bb742d1030864c0fe140666f639428ba4e90b2ca'
  - url: 'https://git.kernel.org/stable/c/61ca8cbbf68f77f25b699ed4358bd232f94ed43b'
  - url: 'https://git.kernel.org/stable/c/f4c1bc6d7331f344ffcea93c2a37badcbe15baa6'
  - url: 'https://git.kernel.org/stable/c/7ccb94901f38a062034b56b43c774050b113758f'
  - url: 'https://git.kernel.org/stable/c/1135ebc225996b3ac1a295652b19a0a706737a6c'
  - url: 'https://git.kernel.org/stable/c/6f7b9dbdc1b7520206abce0049bdd143eb536e75'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00154
epssPercentile: 0.04934
scores:
  vendor: 5.5
  cna: 8.4
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

A flaw was found in the Linux kernel's NTFS3 file system driver. A local attacker could exploit this by providing a specially crafted log record. This crafted record causes a buffer overflow in the page_lcns[] array, leading to memory corruption within an otherwise valid entry.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89615.json)

**kernel: fs/ntfs3: bound page_lcns[] index by the log record** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.