---
id: CVE-2026-72370
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iomap: release pages on atomic dio size mismatch

  If bio_iov_iter_get_pages() or the bounce helper succeeds but builds a
  short bio, the REQ_ATOMIC size check rejects it…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iomap: release pages on atomic dio size mismatch

  If bio_iov_iter_get_pages() or the bounce helper succeeds but builds a
  short bio, the REQ_ATOMIC size check rejects it…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8 <
    177d22d31a4ebf13964a4154035ade385382aced
  - >-
    Linux >= 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8 <
    27ddd3442fc6f698fb8577c7cfb243ddd81ea8c0
  - >-
    Linux >= 9e0933c21c128d6d8ac4d8aae0babaf9a43100b8 <
    681e452683b69a8e1a571cba0f238f8ceacf55d2
  - Linux 6.13
published: '2026-08-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:17:43.083'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72370'
references:
  - url: 'https://git.kernel.org/stable/c/177d22d31a4ebf13964a4154035ade385382aced'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/27ddd3442fc6f698fb8577c7cfb243ddd81ea8c0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/681e452683b69a8e1a571cba0f238f8ceacf55d2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72370.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72370'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516296'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72370'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72370'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081515-CVE-2026-72370-d161@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00206
epssPercentile: 0.10651
ingestedAt: '2026-10-15T11:00:41.683Z'
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-772
---

## Overview

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

iomap: release pages on atomic dio size mismatch

If bio_iov_iter_get_pages() or the bounce helper succeeds but builds a
short bio, the REQ_ATOMIC size check rejects it before submission.  The
old error path only dropped the bio reference, leaving any pages already
attached to the bio unreleased.

Release or unbounce the pages before falling through to out_put_bio on
this error path.

This bug was reported by sashiko:
https://sashiko.dev/#/patchset/20260608073134.95964-1-changfengnan%40bytedance.com

## 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 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72370.json)