{"id":"CVE-2025-40219","state":"PUBLISHED","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.","publishedAt":"2025-12-04T14:50:42.996Z","updatedAt":"2026-10-15T01:09:04.855Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"3cddde484471c602bea04e6f384819d336a1ff84","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"7c37920c96b85ef4255a7acc795e99e63dd38d59","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"1047ca2d816994f31e1475e63e0c0b7825599747","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"97c18f074ff1c12d016a0753072a3afdfa0b9611","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"bea1d373098b22d7142da48750ce5526096425bc","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"f3015627b6e9ddf85cfeaf42405b3c194dde2c36","versionType":"git"},{"version":"18f9e9d150fccfa747875df6f0a9f606740762b3","status":"affected","lessThan":"a5338e365c4559d7b4d7356116b0eb95b12e08d5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/iov.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/iov.c"]}],"references":["https://git.kernel.org/stable/c/3cddde484471c602bea04e6f384819d336a1ff84","https://git.kernel.org/stable/c/d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b","https://git.kernel.org/stable/c/7c37920c96b85ef4255a7acc795e99e63dd38d59","https://git.kernel.org/stable/c/1047ca2d816994f31e1475e63e0c0b7825599747","https://git.kernel.org/stable/c/97c18f074ff1c12d016a0753072a3afdfa0b9611","https://git.kernel.org/stable/c/bea1d373098b22d7142da48750ce5526096425bc","https://git.kernel.org/stable/c/f3015627b6e9ddf85cfeaf42405b3c194dde2c36","https://git.kernel.org/stable/c/a5338e365c4559d7b4d7356116b0eb95b12e08d5","https://cert-portal.siemens.com/productcert/html/ssa-082556.html","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40219.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40219","state":"PUBLISHED","datePublished":"2025-12-04T14:50:42.996Z","dateUpdated":"2026-10-15T01:09:04.855Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.179Z"},"containers":{"cna":{"title":"PCI/IOV: Fix race between SR-IOV enable/disable and hotplug","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(). 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