Linux Kernel up to 6.6.121/6.12.67/6.18.7 debugfs_create_str uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.121/6.12.67/6.18.7 and classified as critical. Impacted is the function debugfs_create_str. The manipulation results in uninitialized pointer. This vulnerability was named CVE-2026-23123. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.6.121/6.12.67/6.18.7. Affected is the function debugfs_create_str. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. The impact remains unknown. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-23123 since 01/13/2026. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/06/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299180 (Linux Distros Unpatched Vulnerability : CVE-2026-23123), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.122, 6.12.68 or 6.18.8 eliminates this vulnerability. Applying the patch aa79a5a959c7c414bd6fba01ea8dbaddd44f13e7/935d0938b570589c8b0a1733d2cba3c39d027f25/5d7c7e1fb3ec24fdd0f9faa27b666d6789e891e8/8cc27f5c6dd17dd090f3a696683f04336c162ff5 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (299180) and CERT Bund (WID-SEC-2026-0421). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • IBM QRadar SIEM

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299180
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23123

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.122/6.12.68/6.18.8
Patch: aa79a5a959c7c414bd6fba01ea8dbaddd44f13e7/935d0938b570589c8b0a1733d2cba3c39d027f25/5d7c7e1fb3ec24fdd0f9faa27b666d6789e891e8/8cc27f5c6dd17dd090f3a696683f04336c162ff5

Timelineinfo

01/13/2026 CVE reserved
02/14/2026 +32 days Advisory disclosed
02/14/2026 +0 days VulDB entry created
05/06/2026 +81 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23123 (🔒)
GCVE (CVE): GCVE-0-2026-23123
GCVE (VulDB): GCVE-100-346098
CERT Bund: WID-SEC-2026-0421 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/14/2026 19:08
Updated: 05/06/2026 08:08
Changes: 02/14/2026 19:08 (58), 02/16/2026 20:02 (2), 02/19/2026 06:32 (1), 03/19/2026 02:47 (10), 05/06/2026 08:08 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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