CVE-2026-72040
Full vulnerability record from the local CVENow database.
Description
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
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-15 06:21:13.123000
Last modified
2026-11-06 17:19:35.517000
View original CVE JSON
{
"id": "CVE-2026-72040",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-15T06:21:13.123",
"lastModified": "2026-11-06T17:19:35.517",
"vulnStatus": "Received",
"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'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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/char/ipmi/ipmi_msghandler.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"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",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/char/ipmi/ipmi_msghandler.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.18",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.184",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.148",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.101",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.40",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.5",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T16:50:44.878492Z",
"id": "CVE-2026-72040",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"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"
}
]
}