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CVE-2025-40219

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

Not available

At a glance

Source
NVD
EPSS
EPSS 0.22 % · percentile 13 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Deferred

Description

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

European references

CERT-FR advisories

Affected products

ProductVersions
Linux · Linuxaffected 18f9e9d150fccfa747875df6f0a9f606740762b3 < 3cddde484471c602bea04e6f384819d336a1ff84 ; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 < d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b ; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 < 7c37920c96b85ef4255a7acc795e99e63dd38d59 ; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 < 1047ca2d816994f31e1475e63e0c0b7825599747 ; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 < 97c18f074ff1c12d016a0753072a3afdfa0b9611 ; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 < bea1d373098b22d7142da48750ce5526096425bc
Linux · Linuxaffected 5.0 ; unaffected 0 < 5.0 ; unaffected 5.10.252 ≤ 5.10.* ; unaffected 5.15.202 ≤ 5.15.* ; unaffected 6.1.165 ≤ 6.1.* ; unaffected 6.6.128 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD