What is CVE-2025-21769?

CVE-2025-21769 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.13.4 and 6.14. CVE-2025-21769 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21769?

CVE-2025-21769 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-2025-21769?

Yes, CVE-2025-21769 has been patched. Fixed versions include 6.13.4 and 6.14. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21769 actively exploited?

CVE-2025-21769 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21769

Medium

In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: Add .owner to vmclock_miscdev_fops Without the .owner field, the module can be unloaded while /dev/vmclock0 is open, leading to an oops.

Package Linux Kernel

Published 2025-02-27

Last modified 2025-10-01

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 6.13 and later are affected. Fixed in 6.13.4, 6.14 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.13.4 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21769 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/3b5709225b43ee33e1026dd1fc0949a7f19b5289
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7b07b040257c1b658ef3eca86e4b6ae02d65069c
Patch

Details

CVE ID CVE-2025-21769

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-02-27

Modified 2025-10-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21769?

CVE-2025-21769 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.13.4 and 6.14. CVE-2025-21769 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21769?

CVE-2025-21769 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-2025-21769?

Yes — CVE-2025-21769 has been patched. Fixed versions include 6.13.4 and 6.14. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21769 actively exploited?

No — CVE-2025-21769 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.