CVE-2026-98217 (GCVE-0-2026-98217)
Vulnerability from cvelistv5
Published
2026-10-06 08:44
Modified
2026-10-19 09:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: IB/mlx4: Fix use-after-free on pkey sysfs registration failure register_pkey_tree() ignores errors from register_one_pkey_tree() and continues registering the remaining slaves. The per-slave error path has already released the pkey parent kobjects, but their pointers remain stored in the device. A later device cleanup therefore passes the stale pointers to kobject_put(), causing a use-after-free. Clear the parent pointers after releasing a failed slave tree and skip unregistered trees during device cleanup. This preserves the existing best-effort registration behavior while preventing a second cleanup of the failed tree.
References
Impacted products
Vendor Product Version
Linux Linux Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
Version: c1e7e466120b80ce49e91af0c9da1ce6dee4844a
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{
  "containers": {
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          "programFiles": [
            "drivers/infiniband/hw/mlx4/sysfs.c"
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              "version": "0",
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx4: Fix use-after-free on pkey sysfs registration failure\n\nregister_pkey_tree() ignores errors from register_one_pkey_tree() and\ncontinues registering the remaining slaves. The per-slave error path has\nalready released the pkey parent kobjects, but their pointers remain\nstored in the device. A later device cleanup therefore passes the stale\npointers to kobject_put(), causing a use-after-free.\n\nClear the parent pointers after releasing a failed slave tree and skip\nunregistered trees during device cleanup. This preserves the existing\nbest-effort registration behavior while preventing a second cleanup of\nthe failed tree."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:47.995Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845"
        },
        {
          "url": "https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345"
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          "url": "https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3"
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          "url": "https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228"
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        },
        {
          "url": "https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a"
        }
      ],
      "title": "IB/mlx4: Fix use-after-free on pkey sysfs registration failure",
      "x_generator": {
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98217",
    "datePublished": "2026-10-06T08:44:53.152Z",
    "dateReserved": "2026-09-25T10:25:14.326Z",
    "dateUpdated": "2026-10-19T09:15:47.995Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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