GHSA-RJ34-CRXV-J5MG

Vulnerability from github – Published: 2026-06-26 21:32 – Updated: 2026-09-09 15:34
VLAI
Details

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

vfio/pci: Clean up DMABUFs before disabling function

On device shutdown, make vfio_pci_core_close_device() call vfio_pci_dma_buf_cleanup() before the function is disabled via vfio_pci_core_disable(). This ensures that all access via DMABUFs is revoked before the function's BARs become inaccessible.

This fixes an issue where, if the function is disabled first, a tiny window exists in which the function's MSE is cleared and yet BARs could still be accessed via the DMABUF. The resources would also be freed and up for grabs by a different driver.

Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-53322"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415",
      "CWE-826"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-26T20:17:25Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Clean up DMABUFs before disabling function\n\nOn device shutdown, make vfio_pci_core_close_device() call\nvfio_pci_dma_buf_cleanup() before the function is disabled via\nvfio_pci_core_disable().  This ensures that all access via DMABUFs is\nrevoked before the function\u0027s BARs become inaccessible.\n\nThis fixes an issue where, if the function is disabled first, a tiny\nwindow exists in which the function\u0027s MSE is cleared and yet BARs\ncould still be accessed via the DMABUF.  The resources would also be\nfreed and up for grabs by a different driver.",
  "id": "GHSA-rj34-crxv-j5mg",
  "modified": "2026-09-09T15:34:37Z",
  "published": "2026-06-26T21:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53322"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:65334"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53322"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2493709"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f1000a30f67cf7d328059242776a858611d5ef9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d97708701434ce72968e771976aaf9d3438fcafd"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53322.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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