PCI/IOV: Fix race between SR-IOV enable/disable and hotplug

{
  "id": "338f4490a95ee8a484eac9a8d03951c1f8739f91c5130db38f56e79bc27403b9",
  "url": "https://osv.dev/vulnerability/CVE-2025-40219",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "PCI/IOV: Fix race between SR-IOV enable/disable and hotplug",
    "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.",
    "evidence": "osv:CVE-2025-40219",
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    "severity": "unknown",
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      "modified": "2026-10-28T02:30:28.152795442Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-082556.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
        "https://git.kernel.org/stable/c/1047ca2d816994f31e1475e63e0c0b7825599747",
        "https://git.kernel.org/stable/c/3cddde484471c602bea04e6f384819d336a1ff84",
        "https://git.kernel.org/stable/c/7c37920c96b85ef4255a7acc795e99e63dd38d59",
        "https://git.kernel.org/stable/c/97c18f074ff1c12d016a0753072a3afdfa0b9611",
        "https://git.kernel.org/stable/c/a5338e365c4559d7b4d7356116b0eb95b12e08d5",
        "https://git.kernel.org/stable/c/bea1d373098b22d7142da48750ce5526096425bc",
        "https://git.kernel.org/stable/c/d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b",
        "https://git.kernel.org/stable/c/f3015627b6e9ddf85cfeaf42405b3c194dde2c36",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40219.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-40219",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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        "value": "CVE-2025-40219",
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 494927,
  "published_at": "2025-12-04T14:50:42.996+00:00"
}