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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/13dcd9269e225e4c4ceabdaeebe2ce4661b54c6e	Patch
https://git.kernel.org/stable/c/2ce8ece5a78da67834db7728edc801889a64f643	Patch
https://git.kernel.org/stable/c/42b380f97d65e76e7b310facd525f730272daf57	Patch
https://git.kernel.org/stable/c/457965c13f0837a289c9164b842d0860133f6274	Patch
https://git.kernel.org/stable/c/477469223b2b840f436ce204333de87cb17e5d93	Patch
https://git.kernel.org/stable/c/59c15b9cc453b74beb9f04c6c398717e73612dc3	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::

History

No history.

Information

Published : 2026-03-25 11:16

Updated : 2026-06-17 10:21

NVD link : CVE-2026-23309

Mitre link : CVE-2026-23309

CVE.ORG link : CVE-2026-23309

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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While kfree() safely handles a NULL\npointer, trigger_data_free() does not. This causes a NULL pointer\ndereference in trigger_data_free() when evaluating\ndata->cmd_ops->set_filter.\n\nFix the problem by adding a NULL pointer check to trigger_data_free().\n\nThe problem was found by an experimental code review agent based on\ngemini-3.1-pro while reviewing backports into v6.18.y."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntracing: A\u00f1adir comprobaci\u00f3n de puntero NULL a trigger_data_free()\n\nSi trigger_data_alloc() falla y devuelve NULL, event_hist_trigger_parse() salta a la ruta de error out_free. Aunque kfree() maneja de forma segura un puntero NULL, trigger_data_free() no lo hace. Esto causa una desreferencia de puntero NULL en trigger_data_free() al evaluar data->cmd_ops->set_filter.\n\nCorregir el problema a\u00f1adiendo una comprobaci\u00f3n de puntero NULL a trigger_data_free().\n\nEl problema fue encontrado por un agente experimental de revisi\u00f3n de c\u00f3digo basado en gemini-3.1-pro mientras revisaba backports en v6.18.y."}], "lastModified": "2026-06-17T10:21:18.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D54E2FD5-7EF9-426A-9AE1-8E8DA970BCC8", "versionEndExcluding": "6.1.167", "versionStartIncluding": "6.1.165"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2099D3D0-97C6-44C5-913D-E616B07A9237", "versionEndExcluding": "6.6.130", "versionStartIncluding": "6.6.128"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "84A22880-A425-402F-879A-9309659E3D36", "versionEndExcluding": "6.12.77", "versionStartIncluding": "6.12.75"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AEF99ED-2A46-4ECD-A9A4-D4D616C3DEE3", "versionEndExcluding": "6.18.17", "versionStartIncluding": "6.18.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EABFC675-2A5E-4569-92F7-1E8942DA0683", "versionEndExcluding": "6.19.7", "versionStartIncluding": "6.19.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}