What is CVE-2026-23123?

CVE-2026-23123 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.6 onward and patched in 6.6.122, 6.12.68, 6.18.8 and others. CVE-2026-23123 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23123?

CVE-2026-23123 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-2026-23123?

Yes, CVE-2026-23123 has been patched. Fixed versions include 6.6.122, 6.12.68, 6.18.8 and others. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23123 actively exploited?

CVE-2026-23123 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23123

Medium

In the Linux kernel, the following vulnerability has been resolved: interconnect: debugfs: initialize src_node and dst_node to empty strings The debugfs_create_str() API assumes that the string pointer is either NULL or points to valid kmalloc() memory. Leaving the pointer uninitialized can cause problems. Initialize src_node and dst_node to empty strings before creating the debugfs entries to guarantee that reads and writes are safe.

Package Linux Kernel

Published 2026-02-14

Last modified 2026-03-18

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-908

CVE-2026-23123 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.6 and later are affected. Fixed in 6.6.122, 6.12.68, 6.18.8, 6.19 and their respective stable series.

Affected from

≥ 6.6

Fixed in

✓ 6.6.122 6.6.x ✓ 6.12.68 6.12.x ✓ 6.18.8 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23123 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/5d7c7e1fb3ec24fdd0f9faa27b666d6789e891e8
Patch
Kernel patch commit
https://git.kernel.org/stable/c/8cc27f5c6dd17dd090f3a696683f04336c162ff5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/935d0938b570589c8b0a1733d2cba3c39d027f25
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2026-23123

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-02-14

Modified 2026-03-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23123?

CVE-2026-23123 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.6 onward and has been patched in 6.6.122, 6.12.68, 6.18.8 and others. CVE-2026-23123 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23123?

CVE-2026-23123 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-2026-23123?

Yes — CVE-2026-23123 has been patched. Fixed versions include 6.6.122, 6.12.68, 6.18.8 and others. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23123 actively exploited?

No — CVE-2026-23123 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.