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CVE-2026-72040

Estado: RecibidaSin puntuar—

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.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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