FKIE_CVE-2026-31399

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-04-07 13:20
Severity ?
Summary
In 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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-31399",
  "lastModified": "2026-04-07T13:20:55.200",
  "metrics": {},
  "published": "2026-04-03T16:16:38.410",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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