What is CVE-2026-23475?

CVE-2026-23475 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 6.0 onward and patched in 6.1.167, 6.6.130, 6.12.78 and others. CVE-2026-23475 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23475?

CVE-2026-23475 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-2026-23475?

Yes, CVE-2026-23475 has been patched. Fixed versions include 6.1.167, 6.6.130, 6.12.78 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23475 actively exploited?

CVE-2026-23475 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-2026-23475

Medium

In the Linux kernel, the following vulnerability has been resolved: spi: fix statistics allocation The controller per-cpu statistics is not allocated until after the controller has been registered with driver core, which leaves a window where accessing the sysfs attributes can trigger a NULL-pointer dereference. Fix this by moving the statistics allocation to controller allocation while tying its lifetime to that of the controller (rather than using implicit devres).

Package Linux Kernel

Published 2026-04-03

Last modified 2026-07-24

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-2026-23475 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 6.0 and later are affected. Fixed in 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10, 7.0 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.1.167 6.1.x ✓ 6.6.130 6.6.x ✓ 6.12.78 6.12.x ✓ 6.18.20 6.18.x ✓ 6.19.10 6.19.x ✓ 7.0

References

8 total

Kernel Git
https://git.kernel.org/stable/c/118ce777d39f03cac99231196f820e4f998613a8

Patch
Kernel Git
https://git.kernel.org/stable/c/378b295f67102eef78cf2c28105f60ae1dab5cc1

Patch
Kernel Git
https://git.kernel.org/stable/c/80c5bd0dca1cc5526ae0f4b273ccd163ed4caa4e

Patch
Kernel Git
https://git.kernel.org/stable/c/dee0774bbb2abb172e9069ce5ffef579b12b3ae9

Patch
Kernel Git
https://git.kernel.org/stable/c/df30056c78e8bead02d4be020199cabdbec0fef1

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-23475

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-03

Modified 2026-07-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23475?

CVE-2026-23475 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 6.0 onward and has been patched in 6.1.167, 6.6.130, 6.12.78 and others. CVE-2026-23475 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23475?

CVE-2026-23475 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-2026-23475?

Yes. CVE-2026-23475 has been patched. Fixed versions include 6.1.167, 6.6.130, 6.12.78 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23475 actively exploited?

No. CVE-2026-23475 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.