CVE-2026-68177
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.
How to fix
- Linux Linux159fdc3e01dca5fdbc412fcd8b239895733a270d, e091351b38818ef620d27f44f4bfd625f13afbff or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 61d445af0a7c70018111919e47beaaee15653f2f ≤ v < 159fdc3e01dca5fdbc412fcd8b239895733a270d, 61d445af0a7c70018111919e47beaaee15653f2f ≤ v < e091351b38818ef620d27f44f4bfd625f13afbff, 6.19 | 159fdc3e01dca5fdbc412fcd8b239895733a270d, e091351b38818ef620d27f44f4bfd625f13afbff |
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