Linux Kernel up to 6.1.27/6.2.14/6.3.1 user_events out-of-bounds

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.1.27/6.2.14/6.3.1. Affected by this vulnerability is an unknown functionality of the component user_events. The manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2023-54139. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.1.27/6.2.14/6.3.1. This issue affects an unknown code of the component user_events. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the first 4 bytes. Ensure that it cannot be negative by returning -EINVAL to prevent out of bounds accesses. Update ftrace self-test to ensure this occurs properly.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2023-54139 since 12/24/2025. The exploitation is known to be difficult. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 280002 (Linux Distros Unpatched Vulnerability : CVE-2023-54139), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.28, 6.2.15 or 6.3.2 eliminates this vulnerability. Applying the patch 0489c2b2c3104b89f078dbcec8c744dfc157d3e9/4fe46b5adf18e3dc606e62c9e6a0413398a17572/fa7f2f5d1739452280c22727c4384a52b72ab5de/cd98c93286a30cc4588dfd02453bec63c2f4acf4 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 (280002) and CERT Bund (WID-SEC-2025-2929). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 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
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 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
• 6.2.11
• 6.2.12
• 6.2.13
• 6.2.14
• 6.3.0
• 6.3.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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