CVE-2025-22124

Medium

In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb In clustermd, separate write-intent-bitmaps are used for each cluster node: 0 4k 8k 12k ------------------------------------------------------------------- | idle | md super | bm super [0] + bits | | bm bits[0, contd] | bm super[1] + bits | bm bits[1, contd] | | bm super[2] + bits | bm bits [2, contd] | bm super[3] + bits | | bm bits [3, contd] | | | So in node 1, pg_index in __write_sb_page() could equal to bitmap->storage.file_pages. Then bitmap_limit will be calculated to 0. md_super_write() will be called with 0 size. That means the first 4k sb area of node 1 will never be updated through filemap_write_page(). This bug causes hang of mdadm/clustermd_tests/01r1_Grow_resize. Here use (pg_index % bitmap->storage.file_pages) to make calculation of bitmap_limit correct.

Package Linux Kernel
Published 2025-04-16
Last modified 2025-11-03
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 6.6.44, 6.10.3, 6.11 and later are affected. Fixed in 6.12.46, 6.14.2, 6.15 and their respective stable series.

Affected from
≥ 6.6.44 ≥ 6.10.3 ≥ 6.11
Fixed in
✓ 6.12.46 6.12.x ✓ 6.14.2 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-22124 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2025-22124?

    CVE-2025-22124 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.6.44 onward and has been patched in 6.12.46, 6.14.2 and 6.15. CVE-2025-22124 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-22124?

    CVE-2025-22124 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-2025-22124?

    Yes — CVE-2025-22124 has been patched. Fixed versions include 6.12.46, 6.14.2 and 6.15. If you are running Linux kernel 6.6.44 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-22124 actively exploited?

    No — CVE-2025-22124 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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