Vulnerability Details CVE-2026-23309
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 2.4%
CVSS Severity
CVSS v3 Score 5.5
References
- https://git.kernel.org/stable/c/13dcd9269e225e4c4ceabdaeebe2ce4661b54c6e
- https://git.kernel.org/stable/c/2ce8ece5a78da67834db7728edc801889a64f643
- https://git.kernel.org/stable/c/42b380f97d65e76e7b310facd525f730272daf57
- https://git.kernel.org/stable/c/457965c13f0837a289c9164b842d0860133f6274
- https://git.kernel.org/stable/c/477469223b2b840f436ce204333de87cb17e5d93
- https://git.kernel.org/stable/c/59c15b9cc453b74beb9f04c6c398717e73612dc3
Products affected by CVE-2026-23309
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cpe:2.3:o:linux:linux_kernel:6.1.165
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cpe:2.3:o:linux:linux_kernel:6.12.75
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cpe:2.3:o:linux:linux_kernel:6.18.14
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cpe:2.3:o:linux:linux_kernel:6.18.16
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cpe:2.3:o:linux:linux_kernel:6.19.4
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cpe:2.3:o:linux:linux_kernel:6.19.6
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cpe:2.3:o:linux:linux_kernel:6.6.128
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cpe:2.3:o:linux:linux_kernel:6.6.129
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cpe:2.3:o:linux:linux_kernel:7.0