CVE-2026-97932: tracing: Don't dereference trace_event_file in deferred trigger free

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-25 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Don't dereference trace_event_file in deferred trigger free 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. Keep the trace_event_call directly in enable_trigger_data so the deferred free does not access the freed trace_event_file.

Affected products

Linux kernel: from 7.1.6 before 7.2; 7.2 — fixed in 7.2, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.2, 7.3. Check the vendor advisory for mitigations.

References

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