GHSA-J3FG-H3R6-7945
Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-05-20 15:35In the Linux kernel, the following vulnerability has been resolved:
nvdimm/bus: Fix potential use after free in asynchronous initialization
Dingisoul with KASAN reports a use after free if device_add() fails in nd_async_device_register().
Commit b6eae0f61db2 ("libnvdimm: Hold reference on parent while scheduling async init") correctly added a reference on the parent device to be held until asynchronous initialization was complete. However, if device_add() results in an allocation failure the ref count of the device drops to 0 prior to the parent pointer being accessed. Thus resulting in use after free.
The bug bot AI correctly identified the fix. Save a reference to the parent pointer to be used to drop the parent reference regardless of the outcome of device_add().
{
"affected": [],
"aliases": [
"CVE-2026-31399"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-03T16:16:38Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvdimm/bus: Fix potential use after free in asynchronous initialization\n\nDingisoul with KASAN reports a use after free if device_add() fails in\nnd_async_device_register().\n\nCommit b6eae0f61db2 (\"libnvdimm: Hold reference on parent while\nscheduling async init\") correctly added a reference on the parent device\nto be held until asynchronous initialization was complete. However, if\ndevice_add() results in an allocation failure the ref count of the\ndevice drops to 0 prior to the parent pointer being accessed. Thus\nresulting in use after free.\n\nThe bug bot AI correctly identified the fix. Save a reference to the\nparent pointer to be used to drop the parent reference regardless of the\noutcome of device_add().",
"id": "GHSA-j3fg-h3r6-7945",
"modified": "2026-05-20T15:35:22Z",
"published": "2026-04-03T18:31:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31399"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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