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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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