What is CVE-2025-38135?

CVE-2025-38135 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 5.2 onward and patched in 5.4.295, 5.10.239, 5.15.186 and others. CVE-2025-38135 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38135?

CVE-2025-38135 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-2025-38135?

Yes, CVE-2025-38135 has been patched. Fixed versions include 5.4.295, 5.10.239, 5.15.186 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38135 actively exploited?

CVE-2025-38135 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2025-38135

Medium

In the Linux kernel, the following vulnerability has been resolved: serial: Fix potential null-ptr-deref in mlb_usio_probe() devm_ioremap() can return NULL on error. Currently, mlb_usio_probe() does not check for this case, which could result in a NULL pointer dereference. Add NULL check after devm_ioremap() to prevent this issue.

Package Linux Kernel

Published 2025-07-03

Last modified 2025-12-17

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-476

CVE-2025-38135 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.2 and later are affected. Fixed in 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3, 6.16 and their respective stable series.

Affected from

≥ 5.2

Fixed in

✓ 5.4.295 5.4.x ✓ 5.10.239 5.10.x ✓ 5.15.186 5.15.x ✓ 6.1.142 6.1.x ✓ 6.6.94 6.6.x ✓ 6.12.34 6.12.x ✓ 6.15.3 6.15.x ✓ 6.16

References

10 total

Kernel Git
https://git.kernel.org/stable/c/19fd9f5a69363d33079097d866eb6082d61bf31d

Patch
Kernel Git
https://git.kernel.org/stable/c/548b0e81b9a0902a8bc8259430ed965663baadfc

Patch
Kernel Git
https://git.kernel.org/stable/c/81159a6b064142b993f2f39828b77e199c77872a

Patch
Kernel Git
https://git.kernel.org/stable/c/86bcae88c9209e334b2f8c252f4cc66beb261886

Patch
Kernel Git
https://git.kernel.org/stable/c/a05ebe384c7ca75476453f3070c67d9cf1d1a89f

Patch

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2025-38135

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-07-03

Modified 2025-12-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38135?

CVE-2025-38135 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.2 onward and has been patched in 5.4.295, 5.10.239, 5.15.186 and others. CVE-2025-38135 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38135?

CVE-2025-38135 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-2025-38135?

Yes. CVE-2025-38135 has been patched. Fixed versions include 5.4.295, 5.10.239, 5.15.186 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38135 actively exploited?

No. CVE-2025-38135 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.