FKIE_CVE-2026-72040

Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-08-23 13:16
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/122ca6b2af714e114c9b872a48372ace31a9ab1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/ipmi/ipmi_msghandler.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "122ca6b2af714e114c9b872a48372ace31a9ab1f",
              "status": "affected",
              "version": "f63723ca7d7623f9dae1990973cd158671f03c56",
              "versionType": "git"
            },
            {
              "lessThan": "9409e18ffe7378d202efe1cf69989df9f67b0369",
              "status": "affected",
              "version": "348121b29594d42d1635648fd3ed31dfa25351d5",
              "versionType": "git"
            },
            {
              "lessThan": "e2a3b77df6aef031455dd83ea8ed4344b7dca1f9",
              "status": "affected",
              "version": "53d6e403affbf6df2c859a0ea00ccfc1e72090ca",
              "versionType": "git"
            },
            {
              "lessThan": "f5c5065963024390ddad51bd455d1adc710de575",
              "status": "affected",
              "version": "b52da4054ee0bf9ecb44996f2c83236ff50b3812",
              "versionType": "git"
            },
            {
              "lessThan": "0fd23994ec8c5436d9f0b50848deb87ed933e6b3",
              "status": "affected",
              "version": "b52da4054ee0bf9ecb44996f2c83236ff50b3812",
              "versionType": "git"
            },
            {
              "lessThan": "a3f3859cecacb64f18fd446271ece9a3b3f2d4de",
              "status": "affected",
              "version": "b52da4054ee0bf9ecb44996f2c83236ff50b3812",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.184",
              "status": "affected",
              "version": "6.1.157",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.148",
              "status": "affected",
              "version": "6.6.113",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.101",
              "status": "affected",
              "version": "6.12.54",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18",
              "status": "affected",
              "version": "6.17.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/ipmi/ipmi_msghandler.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
  "id": "CVE-2026-72040",
  "lastModified": "2026-08-23T13:16:37.900",
  "metrics": {},
  "published": "2026-08-15T06:21:13.123",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/122ca6b2af714e114c9b872a48372ace31a9ab1f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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