---
id: CVE-2026-90204
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ocfs2: validate DIO orphan slot during inode read

  [BUG]
  A corrupted append-DIO dinode (high byte at offset 0xa1
  corrupted from 0 to 1) can carry an i_dio_orphaned_slot…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ocfs2: validate DIO orphan slot during inode read

  [BUG]
  A corrupted append-DIO dinode (high byte at offset 0xa1
  corrupted from 0 to 1) can carry an i_dio_orphaned_slot…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 <
    e35fa6eb4d2a39f8049f62361a4b44930882b5f8
  - >-
    Linux >= 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 <
    418e0ae42fa769d354b15e62c01a00413024755b
  - >-
    Linux >= 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 <
    bb88131c9831075b8dc08cdd375743e5d44c7ca2
  - Linux 4.0
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:46.287'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90204'
references:
  - url: 'https://git.kernel.org/stable/c/418e0ae42fa769d354b15e62c01a00413024755b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bb88131c9831075b8dc08cdd375743e5d44c7ca2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e35fa6eb4d2a39f8049f62361a4b44930882b5f8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00179
epssPercentile: 0.06602
ingestedAt: '2026-09-17T16:21:47.860Z'
---

## Overview

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

ocfs2: validate DIO orphan slot during inode read

[BUG]
A corrupted append-DIO dinode (high byte at offset 0xa1
corrupted from 0 to 1) can carry an i_dio_orphaned_slot
outside the mounted filesystem slot range and trigger a
use-after-free error:

BUG: KASAN: slab-use-after-free in ocfs2_get_system_file_inode+0x780/0x820 fs/ocfs2/sysfile.c:102
Read of size 8 at addr ffff88800b767c00 by task kworker/u8:3/85
Call Trace:
 ...
 ocfs2_get_system_file_inode+0x780/0x820 fs/ocfs2/sysfile.c:102
 ocfs2_wipe_inode+0x292/0xf70 fs/ocfs2/inode.c:840
 ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline]
 ocfs2_evict_inode+0x6c9/0x1170 fs/ocfs2/inode.c:1295
 evict+0x38e/0x8f0 fs/inode.c:810
 iput_final fs/inode.c:1914 [inline]
 iput fs/inode.c:1966 [inline]
 iput+0x55b/0x8b0 fs/inode.c:1926
 ocfs2_recover_orphans+0x610/0xe40 fs/ocfs2/journal.c:2374
 ocfs2_complete_recovery+0x5af/0xd00 fs/ocfs2/journal.c:1373
 ...

[CAUSE]
ocfs2_del_inode_from_orphan() uses i_dio_orphaned_slot to index the
slot-local system inode cache. The dinode validator does not check
this active slot, so an out-of-range value produces an invalid cache
entry pointer that is dereferenced as an inode pointer.

[FIX]
Reject an active i_dio_orphaned_slot outside the slot range during
dinode validation, before DIO orphan recovery can consume it.

## Remediation

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