---
id: CVE-2025-38444
title: 'raid10: cleanup memleak at raid10_make_request'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  raid10: cleanup memleak at raid10_make_request

  If raid10_read_request or raid10_write_request registers a new
  request and the REQ_NOWAIT flag is set, the code does not…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 39db562b3fedb93978a7e42dd216b306740959f8 <
    10c6021a609deb95f23f0cc2f89aa9d4bffb14c7
  - >-
    Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 <
    9af149ca9d0dab6e59e813519d309eff62499864
  - >-
    Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 <
    8fc3d7b23d139e3cbc944c15d99b3cdbed797d2d
  - >-
    Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 <
    2941155d9a5ae098b480d551f3a5f8605d4f9af5
  - >-
    Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 <
    ed7bcd9f617e4107ac0813c516e72e6b8f6029bd
  - >-
    Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 <
    43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24
  - Linux >= 5.15.111 < 5.15.189
  - Linux 5.17
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:56:54.331611Z'
published: '2025-07-25'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:02:38.642Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38444'
references:
  - url: 'https://git.kernel.org/stable/c/10c6021a609deb95f23f0cc2f89aa9d4bffb14c7'
  - url: 'https://git.kernel.org/stable/c/9af149ca9d0dab6e59e813519d309eff62499864'
  - url: 'https://git.kernel.org/stable/c/8fc3d7b23d139e3cbc944c15d99b3cdbed797d2d'
  - url: 'https://git.kernel.org/stable/c/2941155d9a5ae098b480d551f3a5f8605d4f9af5'
  - url: 'https://git.kernel.org/stable/c/ed7bcd9f617e4107ac0813c516e72e6b8f6029bd'
  - url: 'https://git.kernel.org/stable/c/43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24'
tags:
  - cve.org
epss: 0.0018
epssPercentile: 0.07572
ingestedAt: '2026-11-05T22:38:31.971Z'
---

## Overview

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

raid10: cleanup memleak at raid10_make_request

If raid10_read_request or raid10_write_request registers a new
request and the REQ_NOWAIT flag is set, the code does not
free the malloc from the mempool.

unreferenced object 0xffff8884802c3200 (size 192):
   comm "fio", pid 9197, jiffies 4298078271
   hex dump (first 32 bytes):
     00 00 00 00 00 00 00 00 88 41 02 00 00 00 00 00  .........A......
     08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
   backtrace (crc c1a049a2):
     __kmalloc+0x2bb/0x450
     mempool_alloc+0x11b/0x320
     raid10_make_request+0x19e/0x650 [raid10]
     md_handle_request+0x3b3/0x9e0
     __submit_bio+0x394/0x560
     __submit_bio_noacct+0x145/0x530
     submit_bio_noacct_nocheck+0x682/0x830
     __blkdev_direct_IO_async+0x4dc/0x6b0
     blkdev_read_iter+0x1e5/0x3b0
     __io_read+0x230/0x1110
     io_read+0x13/0x30
     io_issue_sqe+0x134/0x1180
     io_submit_sqes+0x48c/0xe90
     __do_sys_io_uring_enter+0x574/0x8b0
     do_syscall_64+0x5c/0xe0
     entry_SYSCALL_64_after_hwframe+0x76/0x7e

V4: changing backing tree to see if CKI tests will pass.
The patch code has not changed between any versions.

## Affected

- `Linux >= 39db562b3fedb93978a7e42dd216b306740959f8 < 10c6021a609deb95f23f0cc2f89aa9d4bffb14c7`
- `Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 9af149ca9d0dab6e59e813519d309eff62499864`
- `Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 8fc3d7b23d139e3cbc944c15d99b3cdbed797d2d`
- `Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 2941155d9a5ae098b480d551f3a5f8605d4f9af5`
- `Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < ed7bcd9f617e4107ac0813c516e72e6b8f6029bd`
- `Linux >= c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 43806c3d5b9bb7d74ba4e33a6a8a41ac988bde24`
- `Linux >= 5.15.111 < 5.15.189`
- `Linux 5.17`

## Remediation

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