CVE-2025-38451

Medium

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.

Package Linux Kernel
Published 2025-07-25
Last modified 2026-05-12
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 6.1.135, 6.6.88, 6.12.25, 6.14.4, 6.15 and later are affected. Fixed in 6.1.146, 6.6.99, 6.12.39, 6.15.7, 6.16 and their respective stable series.

Affected from
≥ 6.1.135 ≥ 6.6.88 ≥ 6.12.25 ≥ 6.14.4 ≥ 6.15
Fixed in
✓ 6.1.146 6.1.x ✓ 6.6.99 6.6.x ✓ 6.12.39 6.12.x ✓ 6.15.7 6.15.x ✓ 6.16

References

The following references provide additional information about CVE-2025-38451 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

5 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2025-38451?

    CVE-2025-38451 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.1.135 onward and has been patched in 6.1.146, 6.6.99, 6.12.39 and others. CVE-2025-38451 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-38451?

    CVE-2025-38451 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2025-38451?

    Yes — CVE-2025-38451 has been patched. Fixed versions include 6.1.146, 6.6.99, 6.12.39 and others. If you are running Linux kernel 6.1.135 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-38451 actively exploited?

    No — CVE-2025-38451 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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