Riskcovery

CVE-2026-68177

tracing: Delay module ref count for "enable_event" trigger

State
Published
Severity
7.8 High
Published
Aug 10, 2026
Updated
Aug 17, 2026
Reserved
Jul 30, 2026

Read the record on cve.org

Description

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

tracing: Delay module ref count for "enable_event" trigger

Triggers are now delayed from freeing, but can still be triggered until after the RCU grace period has ended. The freeing of the enable_event data is put into the private_data_free() callback, but the put of the module refcount is done immediately.

It is possible that if a module is removed that has an event that would enable (or disable) it is still active, it can read the data of the module after it is removed causing a use-after-free bug.

Move the trace_event_put_ref() that releases the module into the delayed callback so that the module can not be removed until any reference to its events are finished.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 61d445af0a7c70018111919e47beaaee15653f2f to before 159fdc3e01dca5fdbc412fcd8b239895733a270dAffected
  • 61d445af0a7c70018111919e47beaaee15653f2f to before e091351b38818ef620d27f44f4bfd625f13afbffAffected
LinuxLinux
  • 6.19Affected
  • before 6.19Not affected
  • 7.1.6 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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