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. 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?

No patch is currently available for CVE-2026-23155. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

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

Not yet patched

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. No fixed version recorded yet.

Affected from

≥ 6.6.122 ≥ 6.12.68 ≥ 6.18.8

References

The following references provide additional information about CVE-2026-23155 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/494fc029f662c331e06b7c2031deff3c64200eed
Patch
Kernel patch commit
https://git.kernel.org/stable/c/713ba826ae114ab339c9a1b31e209bebdadb0ac9
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7a431df418ee6b79841e0b4c7c265a791e3d0a75
Patch

6 patch commits total 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

Not yet patched

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 . 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?

No patch is currently available for CVE-2026-23155. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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.
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. View CWE-476 on MITRE CWE →