---
id: CVE-2025-38451
title: 'md/md-bitmap: fix GPF in bitmap_get_stats()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  md/md-bitmap: fix GPF in bitmap_get_stats()

  The commit message of commit 6ec1f0239485 ("md/md-bitmap: fix stats
  collection for external bitmaps") states:

      Remove t…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 065f4b1cd41d03702426af44193894b925607073 <
    a23b16ba3274961494f5ad236345d238364349ff
  - >-
    Linux >= 0b5390aeaa85eb2f15e0e2ea0731c0995285db5e <
    3d82a729530bd2110ba66e4a1f73461c776edec2
  - >-
    Linux >= eeeba7f43ae27835718a5f5ad6552a8983e75201 <
    3e0542701b37aa25b025d8531583458e4f014c2e
  - >-
    Linux >= 6ec1f0239485028445d213d91cfee5242f3211ba <
    a18f9b08c70e10ea3a897058fee8a4f3b4c146ec
  - >-
    Linux >= 6ec1f0239485028445d213d91cfee5242f3211ba <
    c17fb542dbd1db745c9feac15617056506dd7195
  - Linux 896a6fbefc9050cf940ed57947eda6dc23aa58b0
  - Linux >= 6.1.135 < 6.1.146
  - Linux >= 6.6.88 < 6.6.99
  - Linux >= 6.12.25 < 6.12.39
  - Linux >= 6.14.4 < 6.15
  - Linux 6.15
published: '2025-07-25'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:07:15.964Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38451'
references:
  - url: 'https://git.kernel.org/stable/c/a23b16ba3274961494f5ad236345d238364349ff'
  - url: 'https://git.kernel.org/stable/c/3d82a729530bd2110ba66e4a1f73461c776edec2'
  - url: 'https://git.kernel.org/stable/c/3e0542701b37aa25b025d8531583458e4f014c2e'
  - url: 'https://git.kernel.org/stable/c/a18f9b08c70e10ea3a897058fee8a4f3b4c146ec'
  - url: 'https://git.kernel.org/stable/c/c17fb542dbd1db745c9feac15617056506dd7195'
tags:
  - cve.org
epss: 0.00178
epssPercentile: 0.07363
ingestedAt: '2026-10-15T05:52:46.088Z'
---

## Overview

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

md/md-bitmap: fix GPF in bitmap_get_stats()

The commit message of commit 6ec1f0239485 ("md/md-bitmap: fix stats
collection for external bitmaps") states:

    Remove the external bitmap check as the statistics should be
    available regardless of bitmap storage location.

    Return -EINVAL only for invalid bitmap with no storage (neither in
    superblock nor in external file).

But, the code does not adhere to the above, as it does only check for
a valid super-block for "internal" bitmaps. Hence, we observe:

Oops: GPF, probably for non-canonical address 0x1cd66f1f40000028
RIP: 0010:bitmap_get_stats+0x45/0xd0
Call Trace:

 seq_read_iter+0x2b9/0x46a
 seq_read+0x12f/0x180
 proc_reg_read+0x57/0xb0
 vfs_read+0xf6/0x380
 ksys_read+0x6d/0xf0
 do_syscall_64+0x8c/0x1b0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

We fix this by checking the existence of a super-block for both the
internal and external case.

## Affected

- `Linux >= 065f4b1cd41d03702426af44193894b925607073 < a23b16ba3274961494f5ad236345d238364349ff`
- `Linux >= 0b5390aeaa85eb2f15e0e2ea0731c0995285db5e < 3d82a729530bd2110ba66e4a1f73461c776edec2`
- `Linux >= eeeba7f43ae27835718a5f5ad6552a8983e75201 < 3e0542701b37aa25b025d8531583458e4f014c2e`
- `Linux >= 6ec1f0239485028445d213d91cfee5242f3211ba < a18f9b08c70e10ea3a897058fee8a4f3b4c146ec`
- `Linux >= 6ec1f0239485028445d213d91cfee5242f3211ba < c17fb542dbd1db745c9feac15617056506dd7195`
- `Linux 896a6fbefc9050cf940ed57947eda6dc23aa58b0`
- `Linux >= 6.1.135 < 6.1.146`
- `Linux >= 6.6.88 < 6.6.99`
- `Linux >= 6.12.25 < 6.12.39`
- `Linux >= 6.14.4 < 6.15`
- `Linux 6.15`

## Remediation

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