CVE-2025-40219 (GCVE-0-2025-40219)
Vulnerability from cvelistv5
Published
2025-12-04 14:50
Modified
2026-04-13 06:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI/IOV: Fix race between SR-IOV enable/disable and hotplug Commit 05703271c3cd ("PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV") tried to fix a race between the VF removal inside sriov_del_vfs() and concurrent hot unplug by taking the PCI rescan/remove lock in sriov_del_vfs(). Similarly the PCI rescan/remove lock was also taken in sriov_add_vfs() to protect addition of VFs. This approach however causes deadlock on trying to remove PFs with SR-IOV enabled because PFs disable SR-IOV during removal and this removal happens under the PCI rescan/remove lock. So the original fix had to be reverted. Instead of taking the PCI rescan/remove lock in sriov_add_vfs() and sriov_del_vfs(), fix the race that occurs with SR-IOV enable and disable vs hotplug higher up in the callchain by taking the lock in sriov_numvfs_store() before calling into the driver's sriov_configure() callback.
References
Impacted products
Vendor Product Version
Linux Linux Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
Version: 18f9e9d150fccfa747875df6f0a9f606740762b3
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/iov.c"
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              "version": "0",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/IOV: Fix race between SR-IOV enable/disable and hotplug\n\nCommit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking when\nenabling/disabling SR-IOV\") tried to fix a race between the VF removal\ninside sriov_del_vfs() and concurrent hot unplug by taking the PCI\nrescan/remove lock in sriov_del_vfs(). Similarly the PCI rescan/remove lock\nwas also taken in sriov_add_vfs() to protect addition of VFs.\n\nThis approach however causes deadlock on trying to remove PFs with SR-IOV\nenabled because PFs disable SR-IOV during removal and this removal happens\nunder the PCI rescan/remove lock. So the original fix had to be reverted.\n\nInstead of taking the PCI rescan/remove lock in sriov_add_vfs() and\nsriov_del_vfs(), fix the race that occurs with SR-IOV enable and disable vs\nhotplug higher up in the callchain by taking the lock in\nsriov_numvfs_store() before calling into the driver\u0027s sriov_configure()\ncallback."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:02:15.533Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3cddde484471c602bea04e6f384819d336a1ff84"
        },
        {
          "url": "https://git.kernel.org/stable/c/d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/7c37920c96b85ef4255a7acc795e99e63dd38d59"
        },
        {
          "url": "https://git.kernel.org/stable/c/1047ca2d816994f31e1475e63e0c0b7825599747"
        },
        {
          "url": "https://git.kernel.org/stable/c/97c18f074ff1c12d016a0753072a3afdfa0b9611"
        },
        {
          "url": "https://git.kernel.org/stable/c/bea1d373098b22d7142da48750ce5526096425bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3015627b6e9ddf85cfeaf42405b3c194dde2c36"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5338e365c4559d7b4d7356116b0eb95b12e08d5"
        }
      ],
      "title": "PCI/IOV: Fix race between SR-IOV enable/disable and hotplug",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40219",
    "datePublished": "2025-12-04T14:50:42.996Z",
    "dateReserved": "2025-04-16T07:20:57.179Z",
    "dateUpdated": "2026-04-13T06:02:15.533Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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