CVE-2026-23309

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc10f0efe57728508d796ae4ba7abe4c14ec3d8ef < 13dcd9269e225e4c4ceabdaeebe2ce4661b54c6eaffected
LinuxLinux7e6556e9329bc484e9dcdab6e346d959267c0636 < 59c15b9cc453b74beb9f04c6c398717e73612dc3affected
LinuxLinux9b0513905e0598b9f8cfccab8e47497aed5d935d < 42b380f97d65e76e7b310facd525f730272daf57affected
LinuxLinux335dfe4bc6368e70e8c15419375cf609c4f85558 < 2ce8ece5a78da67834db7728edc801889a64f643affected
LinuxLinuxe42efbe9754da78eafe11f6bd3ca9c8a094a752a < 477469223b2b840f436ce204333de87cb17e5d93affected
LinuxLinux0550069cc25f513ce1f109c88f7c1f01d63297db < 457965c13f0837a289c9164b842d0860133f6274affected
LinuxLinux6.1.165 < 6.1.167affected
LinuxLinux6.6.128 < 6.6.130affected
LinuxLinux6.12.75 < 6.12.77affected
LinuxLinux6.18.14 < 6.18.17affected
LinuxLinux6.19.4 < 6.19.7affected

Weaknesses

References