{"api_version":"1","generated_at":"2026-07-23T15:43:53+00:00","cve":"CVE-2025-40219","urls":{"html":"https://cve.report/CVE-2025-40219","api":"https://cve.report/api/cve/CVE-2025-40219.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40219","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40219"},"summary":{"title":"PCI/IOV: Fix race between SR-IOV enable/disable and hotplug","description":"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's sriov_configure()\ncallback.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-12-04 15:15:57","updated_at":"2026-07-14 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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's sriov_configure()\ncallback."}],"providerMetadata":{"dateUpdated":"2026-05-11T21:45:05.429Z","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":"2026-07-14T12:43:25.428Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-04 15:15:57","lastModifiedDate":"2026-07-14 13:17:53","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40219","Ordinal":"1","Title":"PCI/IOV: Fix race between SR-IOV enable/disable and hotplug","CVE":"CVE-2025-40219","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40219","Ordinal":"1","NoteData":"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's sriov_configure()\ncallback.","Type":"Description","Title":"PCI/IOV: Fix race between SR-IOV enable/disable and hotplug"}]}}}