What is CVE-2026-23155?

CVE-2026-23155 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 6.6.122 onward and patched in 6.6.123, 6.12.69 and 6.18.9. CVE-2026-23155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23155?

CVE-2026-23155 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-2026-23155?

Yes, CVE-2026-23155 has been patched. Fixed versions include 6.6.123, 6.12.69 and 6.18.9. If you are running Linux kernel 6.6.122 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23155 actively exploited?

CVE-2026-23155 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-2026-23155

Medium

In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): fix error message Sinc commit 79a6d1bfe114 ("can: gs_usb: gs_usb_receive_bulk_callback(): unanchor URL on usb_submit_urb() error") a failing resubmit URB will print an info message. In the case of a short read where netdev has not yet been assigned, initialize as NULL to avoid dereferencing an undefined value. Also report the error value of the failed resubmit.

Package Linux Kernel

Published 2026-02-14

Last modified 2026-04-18

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-2026-23155 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 6.6.122, 6.12.68, 6.18.8 and later are affected. Fixed in 6.6.123, 6.12.69, 6.18.9 and their respective stable series.

Affected from

≥ 6.6.122 ≥ 6.12.68 ≥ 6.18.8

Fixed in

✓ 6.6.123 6.6.x ✓ 6.12.69 6.12.x ✓ 6.18.9 6.18.x

References

6 total

Kernel Git
https://git.kernel.org/stable/c/494fc029f662c331e06b7c2031deff3c64200eed

Patch
Kernel Git
https://git.kernel.org/stable/c/713ba826ae114ab339c9a1b31e209bebdadb0ac9

Patch
Kernel Git
https://git.kernel.org/stable/c/8986cdf52f86208df9c7887fee23365b5d37da26

Patch
Kernel Git
https://git.kernel.org/stable/c/923379f1d7e3af8ccbf11edbbcf41f1bb3e9cfe6

Patch
Kernel Git
https://git.kernel.org/stable/c/aed58a28ea71a0d7d0947190fab1e3f4daa1d4a5

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-23155

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-02-14

Modified 2026-04-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23155?

CVE-2026-23155 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 6.6.122 onward and has been patched in 6.6.123, 6.12.69 and 6.18.9. CVE-2026-23155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23155?

CVE-2026-23155 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-2026-23155?

Yes. CVE-2026-23155 has been patched. Fixed versions include 6.6.123, 6.12.69 and 6.18.9. If you are running Linux kernel 6.6.122 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23155 actively exploited?

No. CVE-2026-23155 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.