CVE-2026-97932 Linux CVE debrief

Who should care

Linux kernel developers, administrators, and users who rely on tracing functionality should verify Linux kernel versions and configurations for exposure, assess impact on tracing and kernel functionality, and monitor for potential exploitation attempts. The vulnerability impacts those who utilize tracing functionality in the Linux kernel.

Why it matters

A vulnerability in the Linux kernel has been resolved, affecting the tracing subsystem. Verify Linux kernel versions and configurations for exposure, assess impact on tracing and kernel functionality, and monitor for potential exploitation attempts.

• Verify Linux kernel versions and configurations for exposure
• Assess impact on tracing and kernel functionality
• Monitor for potential exploitation attempts

Technical summary

The enable_event trigger defers trace_event_put_ref() to the trigger free kthread, but the trace_event_file can already be freed when the instance is removed. This vulnerability has been resolved in the Linux kernel. Affected Linux kernel versions and configurations that utilize tracing functionality should be verified for exposure, and impact on tracing and kernel functionality should be assessed. Monitoring for potential exploitation attempts is also recommended. The vulnerability impacts Linux kernel developers, administrators, and users who rely on tracing functionality.

Defensive priority

Verify Linux kernel versions and configurations for exposure, assess impact on tracing and kernel functionality.

Recommended defensive actions

• Verify Linux kernel versions and configurations for exposure
• Assess impact on tracing and kernel functionality
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide limited information on the vulnerability. Further verification is required to determine the affected Linux kernel versions and configurations. Verify Linux kernel versions and configurations for exposure, assess impact on tracing and kernel functionality, and monitor for potential exploitation attempts. The enable_event trigger defers trace_event_put_ref() to the trigger free kthread, but the trace_event_file can already be freed when the instance is removed.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.