What is CVE-2025-38711?

CVE-2025-38711 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 5.15 onward and patched in 5.15.190, 6.1.149, 6.6.103 and others. CVE-2025-38711 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38711?

CVE-2025-38711 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-2025-38711?

Yes, CVE-2025-38711 has been patched. Fixed versions include 5.15.190, 6.1.149, 6.6.103 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38711 actively exploited?

CVE-2025-38711 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2025-38711

Medium

In the Linux kernel, the following vulnerability has been resolved: smb/server: avoid deadlock when linking with ReplaceIfExists If smb2_create_link() is called with ReplaceIfExists set and the name does exist then a deadlock will happen. ksmbd_vfs_kern_path_locked() will return with success and the parent directory will be locked. ksmbd_vfs_remove_file() will then remove the file. ksmbd_vfs_link() will then be called while the parent is still locked. It will try to lock the same parent and will deadlock. This patch moves the ksmbd_vfs_kern_path_unlock() call to *before* ksmbd_vfs_link() and then simplifies the code, removing the file_present flag variable.

Package Linux Kernel

Published 2025-09-04

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

Weakness type

CWE-667

CVE-2025-38711 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.15 and later are affected. Fixed in 5.15.190, 6.1.149, 6.6.103, 6.12.43, 6.15.11, 6.16.2, 6.17 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 5.15.190 5.15.x ✓ 6.1.149 6.1.x ✓ 6.6.103 6.6.x ✓ 6.12.43 6.12.x ✓ 6.15.11 6.15.x ✓ 6.16.2 6.16.x ✓ 6.17

References

9 total

Kernel Git
https://git.kernel.org/stable/c/1e858a7a51c7b8b009d8f246de7ceb7743b44a71

Patch
Kernel Git
https://git.kernel.org/stable/c/814cfdb6358d9b84fcbec9918c8f938cc096a43a

Patch
Kernel Git
https://git.kernel.org/stable/c/9d5012ffe14120f978ee34aef4df3d6cb026b7c4

Patch
Kernel Git
https://git.kernel.org/stable/c/a726fef6d7d4cfc365d3434e3916dbfe78991a33

Patch
Kernel Git
https://git.kernel.org/stable/c/a7dddd62578c2eb6cb28b8835556a121b5157323

Patch

Showing 5 of 9 references View all on NVD

Details

CVE ID CVE-2025-38711

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-04

Modified 2026-05-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38711?

CVE-2025-38711 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 5.15 onward and has been patched in 5.15.190, 6.1.149, 6.6.103 and others. CVE-2025-38711 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38711?

CVE-2025-38711 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-2025-38711?

Yes. CVE-2025-38711 has been patched. Fixed versions include 5.15.190, 6.1.149, 6.6.103 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38711 actively exploited?

No. CVE-2025-38711 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.