CVE-2026-97933

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

tracing: Take trace_array reference when opening a tracer options file

When a tracer option file is opened, it is passed a descriptor that points

to an element on the trace_array's topts array. This element has

information to find the trace array and other information. It uses this

element to take a reference of the trace_array so that the trace_array

does not get removed while this file is opened.

Unfortunately, there's a race condition where the element itself could be

freed by the removal of the instance the trace_array represents causing a

use-after-free as this element that is used to find the trace_array to

increment its reference counter is also freed when the instance is

removed.

To solve this, add a trace_array_tracer_options_get() helper function that

will take the address of the element that is passed to the open function

by the inode->i_private pointer and search all the trace_arrays under a

lock to fin

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References