What is CVE-2025-21924?

CVE-2025-21924 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.14 onward and patched in 5.15.179, 6.1.131, 6.6.83 and others. CVE-2025-21924 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21924?

CVE-2025-21924 has a CVSS score of 5.5 out of 10, rated Medium severity. 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-2025-21924?

Yes, CVE-2025-21924 has been patched. Fixed versions include 5.15.179, 6.1.131, 6.6.83 and others. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21924 actively exploited?

CVE-2025-21924 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21924

Medium

In the Linux kernel, the following vulnerability has been resolved: net: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an error During the initialization of ptp, hclge_ptp_get_cycle might return an error and returned directly without unregister clock and free it. To avoid that, call hclge_ptp_destroy_clock to unregist and free clock if hclge_ptp_get_cycle failed.

Package Linux Kernel

Published 2025-04-01

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

Weakness type

CWE-459

CVE-2025-21924 is classified as CWE-459

See CWE-459 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.14 and later are affected. Fixed in 5.15.179, 6.1.131, 6.6.83, 6.12.19, 6.13.7, 6.14 and their respective stable series.

Affected from

≥ 5.14

Fixed in

✓ 5.15.179 5.15.x ✓ 6.1.131 6.1.x ✓ 6.6.83 6.6.x ✓ 6.12.19 6.12.x ✓ 6.13.7 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21924 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Kernel patch commit
https://git.kernel.org/stable/c/21dba813d9821687a7f9aff576798ba21a859a32
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2c04e507f3a5c5dc6e2b9ab37d8cdedee1ef1a37
Patch
Kernel patch commit
https://git.kernel.org/stable/c/33244e98aa9503585e585335fe2ceb4492630949
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2025-21924

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-04-01

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21924?

CVE-2025-21924 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.14 onward and has been patched in 5.15.179, 6.1.131, 6.6.83 and others. CVE-2025-21924 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21924?

CVE-2025-21924 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-2025-21924?

Yes — CVE-2025-21924 has been patched. Fixed versions include 5.15.179, 6.1.131, 6.6.83 and others. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21924 actively exploited?

No — CVE-2025-21924 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.