CVE-2026-72040 (GCVE-0-2026-72040)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-23 12:46
VLAI
Title
ipmi: fix refcount leak in i_ipmi_request()
Summary
In the Linux kernel, the following vulnerability has been resolved: ipmi: fix refcount leak in i_ipmi_request() When a caller provides a `supplied_recv` message to i_ipmi_request(), the function increments the user's `nr_msgs` reference count. If an error occurs later, the out_err cleanup path only frees the recv_msg if the function allocated it itself (i.e., !supplied_recv). In the supplied_recv case the cleanup is skipped, leaving the reference count elevated. The caller ipmi_request_supply_msgs() does not release the supplied_recv on error, so the reference is permanently leaked. Fix this by explicitly reverting the reference count operations when a supplied recv_msg with a valid user pointer is present in the error path: decrement nr_msgs and drop the user's kref.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f63723ca7d7623f9dae1990973cd158671f03c56 , < 122ca6b2af714e114c9b872a48372ace31a9ab1f (git)
Affected: 348121b29594d42d1635648fd3ed31dfa25351d5 , < 9409e18ffe7378d202efe1cf69989df9f67b0369 (git)
Affected: 53d6e403affbf6df2c859a0ea00ccfc1e72090ca , < e2a3b77df6aef031455dd83ea8ed4344b7dca1f9 (git)
Affected: b52da4054ee0bf9ecb44996f2c83236ff50b3812 , < f5c5065963024390ddad51bd455d1adc710de575 (git)
Affected: b52da4054ee0bf9ecb44996f2c83236ff50b3812 , < 0fd23994ec8c5436d9f0b50848deb87ed933e6b3 (git)
Affected: b52da4054ee0bf9ecb44996f2c83236ff50b3812 , < a3f3859cecacb64f18fd446271ece9a3b3f2d4de (git)
Affected: 0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5 (git)
Affected: 6.1.157 , < 6.1.184 (semver)
Affected: 6.6.113 , < 6.6.148 (semver)
Affected: 6.12.54 , < 6.12.101 (semver)
Affected: 6.17.4 , < 6.18 (semver)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: fix refcount leak in i_ipmi_request()\n\nWhen a caller provides a `supplied_recv` message to i_ipmi_request(),\nthe function increments the user\u0027s `nr_msgs` reference count. If an\nerror occurs later, the out_err cleanup path only frees the recv_msg\nif the function allocated it itself (i.e., !supplied_recv). In the\nsupplied_recv case the cleanup is skipped, leaving the reference count\nelevated. The caller ipmi_request_supply_msgs() does not release the\nsupplied_recv on error, so the reference is permanently leaked.\n\nFix this by explicitly reverting the reference count operations when a\nsupplied recv_msg with a valid user pointer is present in the error\npath: decrement nr_msgs and drop the user\u0027s kref."
        }
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          "url": "https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de"
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    "dateReserved": "2026-08-09T03:40:39.901Z",
    "dateUpdated": "2026-08-23T12:46:30.954Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T10:02:44+00:00",
      "cve": "CVE-2026-72040",
      "id": "CVE-2026-72040",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ipmi: fix refcount leak in i_ipmi_request()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72040.json",
      "version": "3"
    }
  }
}



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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.

Sightings

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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.


Detection rules are retrieved from Rulezet.