What is CVE-2025-21660?

CVE-2025-21660 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.1.113 onward and patched in 6.1.125, 6.6.72, 6.12.10 and others. CVE-2025-21660 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21660?

CVE-2025-21660 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-2025-21660?

Yes, CVE-2025-21660 has been patched. Fixed versions include 6.1.125, 6.6.72, 6.12.10 and others. If you are running Linux kernel 6.1.113 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21660 actively exploited?

CVE-2025-21660 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21660

Medium

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked When `ksmbd_vfs_kern_path_locked` met an error and it is not the last entry, it will exit without restoring changed path buffer. But later this buffer may be used as the filename for creation.

Package Linux Kernel

Published 2025-01-21

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 6.1.113, 6.6.54, 6.10.13, 6.11.2, 6.12 and later are affected. Fixed in 6.1.125, 6.6.72, 6.12.10, 6.13 and their respective stable series.

Affected from

≥ 6.1.113 ≥ 6.6.54 ≥ 6.10.13 ≥ 6.11.2 ≥ 6.12

Fixed in

✓ 6.1.125 6.1.x ✓ 6.6.72 6.6.x ✓ 6.12.10 6.12.x ✓ 6.13

References

The following references provide additional information about CVE-2025-21660 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/2025/03/msg00001.html
Kernel patch commit
https://git.kernel.org/stable/c/13e41c58c74baa71f34c0830eaa3c29d53a6e964
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2ac538e40278a2c0c051cca81bcaafc547d61372
Patch
Kernel patch commit
https://git.kernel.org/stable/c/51669f4af5f7959565b48e55691ba92fabf5c587
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2025-21660

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-01-21

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21660?

CVE-2025-21660 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.1.113 onward and has been patched in 6.1.125, 6.6.72, 6.12.10 and others. CVE-2025-21660 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21660?

CVE-2025-21660 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-2025-21660?

Yes — CVE-2025-21660 has been patched. Fixed versions include 6.1.125, 6.6.72, 6.12.10 and others. If you are running Linux kernel 6.1.113 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21660 actively exploited?

No — CVE-2025-21660 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.