Linux Kernel up to 5.15.106/6.1.23/6.2.10 fs information disclosure

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 5.15.106/6.1.23/6.2.10. This affects an unknown function of the component fs. This manipulation causes information disclosure. This vulnerability is tracked as CVE-2023-54128. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.106/6.1.23/6.2.10. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component fs. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: fs: drop peer group ids under namespace lock When cleaning up peer group ids in the failure path we need to make sure to hold on to the namespace lock. Otherwise another thread might just turn the mount from a shared into a non-shared mount concurrently.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-54128 since 12/24/2025. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 279886 (Linux Distros Unpatched Vulnerability : CVE-2023-54128), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.107, 6.1.24 or 6.2.11 eliminates this vulnerability. Applying the patch 0af8fae81d8b7f1beddc17c5d4cfa43235134648/ddca03d97daa7b07b60c52e3d3060762732c6666/65c324d3f35c05e37afec39ac80743583fdcc96c/cb2239c198ad9fbd5aced22cf93e45562da781eb 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 (279886) and CERT Bund (WID-SEC-2025-2929). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.15.106
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.2.8
• 6.2.9
• 6.2.10

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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