---
id: CVE-2026-97488
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  qnx4: handle set_blocksize failures

  qnx4 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:

  qnx4: handle set_blocksize failures

  qnx4 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 <
    de8bd760ca0c2a3f337bbafbeb1dcad0853787cc
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    3f2088a3973faf3ed9b56ea3d3f0240b9a797016
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c9f03e750d9ddf0f42c24e3ba683f26e377ffd72
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    f83e416c2242fb298ad33b756c83aae75d9e359c
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    aac97a4b3f47c36a47f934aa679407b718b67537
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    60f7ccf669882262330171eda51a4f52fa2e69c9
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c7d911ea1cc9a63b07e52f5e75b263be0615b289
  - Linux 2.6.12
published: '2026-09-24'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:58.803'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97488'
references:
  - url: 'https://git.kernel.org/stable/c/3f2088a3973faf3ed9b56ea3d3f0240b9a797016'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/60f7ccf669882262330171eda51a4f52fa2e69c9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aac97a4b3f47c36a47f934aa679407b718b67537'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c7d911ea1cc9a63b07e52f5e75b263be0615b289'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c9f03e750d9ddf0f42c24e3ba683f26e377ffd72'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/de8bd760ca0c2a3f337bbafbeb1dcad0853787cc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f83e416c2242fb298ad33b756c83aae75d9e359c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97488.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97488'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2540557'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97488'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97488'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97488.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00173
epssPercentile: 0.06629
cvssSource: vendor
ingestedAt: '2026-09-24T16:47:15.868Z'
---

## Overview

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

qnx4: handle set_blocksize failures

qnx4 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** · Low · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97488.json)