What is CVE-2026-23019?

CVE-2026-23019 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 5.10 onward and patched in 5.15.198, 6.1.161, 6.6.121 and others. CVE-2026-23019 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23019?

CVE-2026-23019 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-2026-23019?

Yes, CVE-2026-23019 has been patched. Fixed versions include 5.15.198, 6.1.161, 6.6.121 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23019 actively exploited?

CVE-2026-23019 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-2026-23019

Medium

In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix NULL dereference on devlink_alloc() failure devlink_alloc() may return NULL on allocation failure, but prestera_devlink_alloc() unconditionally calls devlink_priv() on the returned pointer. This leads to a NULL pointer dereference if devlink allocation fails. Add a check for a NULL devlink pointer and return NULL early to avoid the crash.

Package Linux Kernel

Published 2026-01-31

Last modified 2026-07-14

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-2026-23019 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 5.10 and later are affected. Fixed in 5.15.198, 6.1.161, 6.6.121, 6.12.66, 6.18.6, 6.19 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.15.198 5.15.x ✓ 6.1.161 6.1.x ✓ 6.6.121 6.6.x ✓ 6.12.66 6.12.x ✓ 6.18.6 6.18.x ✓ 6.19

References

7 total

Kernel Git
https://git.kernel.org/stable/c/325aea74be7e192b5c947c782da23b0d19a5fda2

Patch
Kernel Git
https://git.kernel.org/stable/c/326a4b7e61d01db3507f71c8bb5e85362f607064

Patch
Kernel Git
https://git.kernel.org/stable/c/3950054c9512add0cc79ab7e72b6d2f9f675e25b

Patch
Kernel Git
https://git.kernel.org/stable/c/8a4333b2818f0d853b43e139936c20659366e4a0

Patch
Kernel Git
https://git.kernel.org/stable/c/94e070cd50790317fba7787ae6006934b7edcb6f

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2026-23019

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-01-31

Modified 2026-07-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23019?

CVE-2026-23019 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 5.10 onward and has been patched in 5.15.198, 6.1.161, 6.6.121 and others. CVE-2026-23019 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23019?

CVE-2026-23019 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-2026-23019?

Yes. CVE-2026-23019 has been patched. Fixed versions include 5.15.198, 6.1.161, 6.6.121 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23019 actively exploited?

No. CVE-2026-23019 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.