---
id: CVE-2026-90419
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nilfs2: prevent out-of-bounds read in super root block parsing

  super-root inode metadata size is trusted before nilfs_read_inode_common().

  Reject super-root inode siz…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nilfs2: prevent out-of-bounds read in super root block parsing

  super-root inode metadata size is trusted before nilfs_read_inode_common().

  Reject super-root inode siz…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    16df2520502867a4f34e202b89d01243d59bb8b5
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    dcc85fc28f884038735464f6f104dda9c7dbfad6
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    5b69ebe20d7f944c1f45177dca0c11474ac277cc
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    7029e70cf86d5c54c0a2812479b0bee2cabcbaaa
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    71bd64471ff583101b4a33dfc838ce29aef57960
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    842397fdfd2e61d6470166c796f3125b6c27a162
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    15c8559376416a84c3d8402fd8d0c89bb323d05f
  - >-
    Linux >= 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f <
    7cb2f76a6a2ba2130b577cb8ac13e1e46c4fc689
  - Linux 2.6.30
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:58.473'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90419'
references:
  - url: 'https://git.kernel.org/stable/c/15c8559376416a84c3d8402fd8d0c89bb323d05f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/16df2520502867a4f34e202b89d01243d59bb8b5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5b69ebe20d7f944c1f45177dca0c11474ac277cc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7029e70cf86d5c54c0a2812479b0bee2cabcbaaa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/71bd64471ff583101b4a33dfc838ce29aef57960'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7cb2f76a6a2ba2130b577cb8ac13e1e46c4fc689'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/842397fdfd2e61d6470166c796f3125b6c27a162'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dcc85fc28f884038735464f6f104dda9c7dbfad6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90419.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90419'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536403'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90419'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90419'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90419.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00176
epssPercentile: 0.07125
ingestedAt: '2026-09-17T16:21:47.795Z'
cwe:
  - CWE-125
scores:
  nvd: 7.1
  vendor: 5.5
---

## Overview

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

nilfs2: prevent out-of-bounds read in super root block parsing

super-root inode metadata size is trusted before nilfs_read_inode_common().

Reject super-root inode sizes whose computed on-disk footprint exceeds the
filesystem block size. This prevents malformed filesystem images from
making nilfs_read_inode_common() read past the end of the super-root block.

[ryusuke: clarify the commit title]

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90419.json)