---
id: CVE-2026-97486
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  hpfs: handle set_blocksize failures

  hpfs uses buffer_heads, which don't handle block size > PAGE_SIZE well.
  Without this, mounting will hit the

          BUG_ON(offset …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  hpfs: handle set_blocksize failures

  hpfs uses buffer_heads, which don't handle block size > PAGE_SIZE well.
  Without this, mounting will hit the

          BUG_ON(offset …
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'
cwe:
  - CWE-617
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    f7b0cde62edb8ceff8bcc17ba3f1b086646fff89
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b618f681acb6748faf95eee9af2aac5455a74e68
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    10f226687bcb07ed925a453b6f25e817165d113b
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    0451927f42b0282d80d402e8e8c46ff34e9f606f
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    fc79fcc78cb771f2a803e52149cac5ca9050fd05
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    f27e21cf3c0446a3536ea9b588a78a46b0a2cb66
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    a405996f23e04942aad064ab8d50c55827482872
  - Linux 2.6.12
published: '2026-09-24'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:58.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97486'
references:
  - url: 'https://git.kernel.org/stable/c/0451927f42b0282d80d402e8e8c46ff34e9f606f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/10f226687bcb07ed925a453b6f25e817165d113b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a405996f23e04942aad064ab8d50c55827482872'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b618f681acb6748faf95eee9af2aac5455a74e68'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f27e21cf3c0446a3536ea9b588a78a46b0a2cb66'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f7b0cde62edb8ceff8bcc17ba3f1b086646fff89'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc79fcc78cb771f2a803e52149cac5ca9050fd05'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97486.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97486'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2540427'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97486'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97486'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97486.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00173
epssPercentile: 0.06629
cvssSource: vendor
ingestedAt: '2026-09-24T16:47:15.870Z'
---

## Overview

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

hpfs: handle set_blocksize failures

hpfs uses buffer_heads, which don't handle block size > PAGE_SIZE well.
Without this, mounting will hit the

        BUG_ON(offset >= folio_size(folio));

in folio_set_bh on the first __bread_gfp call.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-30 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97486.json)