Linux Kernel up to 7.2.4/7.3-rc1 Tracing use after free

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.2.4/7.3-rc1 and classified as problematic. This affects an unknown function of the component Tracing. The manipulation results in use after free. This vulnerability is cataloged as CVE-2026-90014. The attack must be initiated from a local position. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 7.2.4/7.3-rc1. Affected is an unknown code of the component Tracing. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: tracing: Have show_event_filters/triggers files take trace array ref The newly added files show_event_filters and show_event_triggers that show all filters or triggers that are set within the trace array do not take a reference for the trace array it is showing. Without taking a reference, the trace_array may be freed via "rmdir" while a task is reading one of theses files. Those files iterate all the events within an instance (trace_array) and nothing prevents that instance from being freed while its data is being read. This causes a use-after-free crash. Have the open of both those files take the trace_array reference via the trace_array_get() that prevents the trace_array from being freed while the files are opened.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-90014 since 09/11/2026. The exploitability is told to be easy. The attack needs to be approached locally. Additional levels of successful authentication are needed for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 7.2.5 or 7.3-rc2 eliminates this vulnerability. Applying the patch 2ee3f7d43f79efaca0cd84a6798653d9d75ce60b/f4a771cc684c7354b6200147f7252c58d17408ff is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.3-rc1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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