FKIE_CVE-2026-98217

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ced1186fea7c77e16681c7ef4802897885989c3b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx4/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "791471421d848ce13e84f4b21c9e19973d471c4e",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "734f066933484f6c7cedea0312763249beed5845",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "a07bee32127d7c4cd3b1bb9a088e21d0c93634c9",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "cf20d7476754c00eec04ae23d3e929de33ce0345",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "0c3482e965b18bc242e54e899d1c4d391ca8e5e3",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "ffb80872617b5f9b3dd1536ec2909029fa66f228",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "ced1186fea7c77e16681c7ef4802897885989c3b",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            },
            {
              "lessThan": "1af874e9f4ce22ccf8b10ab5462f32c70d3be21a",
              "status": "affected",
              "version": "c1e7e466120b80ce49e91af0c9da1ce6dee4844a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx4/sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.7"
            },
            {
              "lessThan": "3.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-98217",
  "lastModified": "2026-10-06T09:18:08.423",
  "metrics": {},
  "published": "2026-10-06T09:18:08.423",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0c3482e965b18bc242e54e899d1c4d391ca8e5e3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1af874e9f4ce22ccf8b10ab5462f32c70d3be21a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/734f066933484f6c7cedea0312763249beed5845"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/791471421d848ce13e84f4b21c9e19973d471c4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a07bee32127d7c4cd3b1bb9a088e21d0c93634c9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ced1186fea7c77e16681c7ef4802897885989c3b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf20d7476754c00eec04ae23d3e929de33ce0345"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ffb80872617b5f9b3dd1536ec2909029fa66f228"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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