CVE-2026-23309
Description
In the Linux kernel, the following vulnerability has been resolved: tracing: Add NULL pointer check to trigger_data_free() If trigger_data_alloc() fails and returns NULL, event_hist_trigger_parse() jumps to the out_free error path. While kfree() safely handles a NULL pointer, trigger_data_free() does not. This causes a NULL pointer dereference in trigger_data_free() when evaluating data->cmd_ops->set_filter. Fix the problem by adding a NULL pointer check to trigger_data_free(). The problem was found by an experimental code review agent based on gemini-3.1-pro while reviewing backports into v6.18.y.
How to fix
- linux linux_kernel6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.1.165 ≤ v < 6.1.167, 6.6.128 ≤ v < 6.6.130, 6.12.75 ≤ v < 6.12.77, 6.18.14 ≤ v < 6.18.17, 6.19.4 ≤ v < 6.19.7, 7.0 | 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7 |
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