CVE-2026-68146

A flaw was found in the Linux kernel's ftrace tracing subsystem. When a userspace program opens a trace file descriptor and shares it across multiple threads, concurrent write operations can lead to a race condition in the trace_parser structure. This can result in corrupted input or undefined behavior within the kernel, potentially impacting system stability.

This issue affects ftrace when a trace fd is shared across threads. Concurrent writes race on the per-fd trace_parser without serialization. Systems not using shared trace fds are not affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.