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🛡️ CVE-2025-38444 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-401 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

raid10: cleanup memleak at raid10_make_request

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-38444 is classified as CWE-401: Memory Leak. Allocated memory is never released, so long-running or repeated operations gradually exhaust it.

Affected software

CVE-2025-38444 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.7.0 up to 6.15.7)
  • linux-kernel

Timeline and source

Published on 25 July 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org

CVE-2025-38444 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-401
Public Exploit ✅ No
Source NVD
Published 2025-07-25
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.7.0 6.15.7
linux-kernel — —

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