ghsa-c86m-78v8-4hvw
Vulnerability from github
Published
2024-12-27 15:31
Modified
2025-02-03 15:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

iommu/s390: Implement blocking domain

This fixes a crash when surprise hot-unplugging a PCI device. This crash happens because during hot-unplug __iommu_group_set_domain_nofail() attaching the default domain fails when the platform no longer recognizes the device as it has already been removed and we end up with a NULL domain pointer and UAF. This is exactly the case referred to in the second comment in __iommu_device_set_domain() and just as stated there if we can instead attach the blocking domain the UAF is prevented as this can handle the already removed device. Implement the blocking domain to use this handling. With this change, the crash is fixed but we still hit a warning attempting to change DMA ownership on a blocked device.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-53232"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-27T14:15:31Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/s390: Implement blocking domain\n\nThis fixes a crash when surprise hot-unplugging a PCI device. This crash\nhappens because during hot-unplug __iommu_group_set_domain_nofail()\nattaching the default domain fails when the platform no longer\nrecognizes the device as it has already been removed and we end up with\na NULL domain pointer and UAF. This is exactly the case referred to in\nthe second comment in __iommu_device_set_domain() and just as stated\nthere if we can instead attach the blocking domain the UAF is prevented\nas this can handle the already removed device. Implement the blocking\ndomain to use this handling.  With this change, the crash is fixed but\nwe still hit a warning attempting to change DMA ownership on a blocked\ndevice.",
  "id": "GHSA-c86m-78v8-4hvw",
  "modified": "2025-02-03T15:32:00Z",
  "published": "2024-12-27T15:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53232"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3be34fa1cdbf180c1a948cfededfdf2cdc497199"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd89d94f3ea6fdaee983cbc69226a00b9bde6d59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecda483339a5151e3ca30d6b82691ef6f1d17912"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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