What is CVE-2025-38404?

CVE-2025-38404 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 6.1.143 onward and patched in 6.1.144, 6.6.97, 6.12.37 and others. CVE-2025-38404 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38404?

CVE-2025-38404 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-2025-38404?

Yes, CVE-2025-38404 has been patched. Fixed versions include 6.1.144, 6.6.97, 6.12.37 and others. If you are running Linux kernel 6.1.143 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38404 actively exploited?

CVE-2025-38404 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-2025-38404

Medium

In the Linux kernel, the following vulnerability has been resolved: usb: typec: displayport: Fix potential deadlock The deadlock can occur due to a recursive lock acquisition of `cros_typec_altmode_data::mutex`. The call chain is as follows: 1. cros_typec_altmode_work() acquires the mutex 2. typec_altmode_vdm() -> dp_altmode_vdm() -> 3. typec_altmode_exit() -> cros_typec_altmode_exit() 4. cros_typec_altmode_exit() attempts to acquire the mutex again To prevent this, defer the `typec_altmode_exit()` call by scheduling it rather than calling it directly from within the mutex-protected context.

Package Linux Kernel

Published 2025-07-25

Last modified 2025-12-23

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-2025-38404 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 6.1.143, 6.6.96, 6.12.36, 6.15.5 and later are affected. Fixed in 6.1.144, 6.6.97, 6.12.37, 6.15.6 and their respective stable series.

Affected from

≥ 6.1.143 ≥ 6.6.96 ≥ 6.12.36 ≥ 6.15.5

Fixed in

✓ 6.1.144 6.1.x ✓ 6.6.97 6.6.x ✓ 6.12.37 6.12.x ✓ 6.15.6 6.15.x

References

10 total

Kernel Git
https://git.kernel.org/stable/c/099cf1fbb8afc3771f408109f62bdec66f85160e

Patch
Kernel Git
https://git.kernel.org/stable/c/63cff9f57e86b2dc25d7487ca0118df89a665296

Patch
Kernel Git
https://git.kernel.org/stable/c/749d9076735fb497aae60fbea9fff563f9ea3254

Patch
Kernel Git
https://git.kernel.org/stable/c/76cf1f33e7319fe74c94ac92f9814094ee8cc84b

Patch
Kernel Git
https://git.kernel.org/stable/c/7be0d1ea71f52595499da39cea484a895e8ed042

Patch

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2025-38404

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-07-25

Modified 2025-12-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38404?

CVE-2025-38404 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 6.1.143 onward and has been patched in 6.1.144, 6.6.97, 6.12.37 and others. CVE-2025-38404 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38404?

CVE-2025-38404 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-2025-38404?

Yes. CVE-2025-38404 has been patched. Fixed versions include 6.1.144, 6.6.97, 6.12.37 and others. If you are running Linux kernel 6.1.143 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38404 actively exploited?

No. CVE-2025-38404 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.