CVE-2026-23309 (GCVE-0-2026-23309)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-05-11 22:04
VLAI?
Title
tracing: Add NULL pointer check to trigger_data_free()
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c10f0efe57728508d796ae4ba7abe4c14ec3d8ef , < 13dcd9269e225e4c4ceabdaeebe2ce4661b54c6e (git)
Affected: 7e6556e9329bc484e9dcdab6e346d959267c0636 , < 59c15b9cc453b74beb9f04c6c398717e73612dc3 (git)
Affected: 9b0513905e0598b9f8cfccab8e47497aed5d935d , < 42b380f97d65e76e7b310facd525f730272daf57 (git)
Affected: 335dfe4bc6368e70e8c15419375cf609c4f85558 , < 2ce8ece5a78da67834db7728edc801889a64f643 (git)
Affected: e42efbe9754da78eafe11f6bd3ca9c8a094a752a , < 477469223b2b840f436ce204333de87cb17e5d93 (git)
Affected: 0550069cc25f513ce1f109c88f7c1f01d63297db , < 457965c13f0837a289c9164b842d0860133f6274 (git)
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Linux Linux Affected: 6.1.165 , < 6.1.167 (semver)
Affected: 6.6.128 , < 6.6.130 (semver)
Affected: 6.12.75 , < 6.12.77 (semver)
Affected: 6.18.14 , < 6.18.17 (semver)
Affected: 6.19.4 , < 6.19.7 (semver)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace_events_trigger.c"
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              "status": "affected",
              "version": "6.18.14",
              "versionType": "semver"
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              "status": "affected",
              "version": "6.19.4",
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Add NULL pointer check to trigger_data_free()\n\nIf trigger_data_alloc() fails and returns NULL, event_hist_trigger_parse()\njumps to the out_free error path. 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-\u003ecmd_ops-\u003eset_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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:04:23.455Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/477469223b2b840f436ce204333de87cb17e5d93"
        },
        {
          "url": "https://git.kernel.org/stable/c/457965c13f0837a289c9164b842d0860133f6274"
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      ],
      "title": "tracing: Add NULL pointer check to trigger_data_free()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23309",
    "datePublished": "2026-03-25T10:27:04.828Z",
    "dateReserved": "2026-01-13T15:37:45.994Z",
    "dateUpdated": "2026-05-11T22:04:23.455Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-05-17",
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      "percentile": "0.10448"
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  }
}


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