CVE-2025-40219None▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < 3cddde484471c602bea04e6f384819d336a1ff84Linux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < d7673ac466eca37ec3e6b7cc9ccdb06de3304e9bLinux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < 7c37920c96b85ef4255a7acc795e99e63dd38d59Linux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < 1047ca2d816994f31e1475e63e0c0b7825599747Linux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < 97c18f074ff1c12d016a0753072a3afdfa0b9611Linux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < bea1d373098b22d7142da48750ce5526096425bcLinux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < f3015627b6e9ddf85cfeaf42405b3c194dde2c36Linux >= 18f9e9d150fccfa747875df6f0a9f606740762b3 < a5338e365c4559d7b4d7356116b0eb95b12e08d5Linux 5.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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