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CVE-2025-40219

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, and 2 more
None on Exploit-DB, Metasploit or GitHub

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in 3cddde484471c602bea04e6f384819d336a1ff84; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in 7c37920c96b85ef4255a7acc795e99e63dd38d59; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in 1047ca2d816994f31e1475e63e0c0b7825599747; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in 97c18f074ff1c12d016a0753072a3afdfa0b9611; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in bea1d373098b22d7142da48750ce5526096425bc; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in f3015627b6e9ddf85cfeaf42405b3c194dde2c36; From 18f9e9d150fccfa747875df6f0a9f606740762b3 · fixed in a5338e365c4559d7b4d7356116b0eb95b12e08d5

  • Linux Linux

    5.0

  • KernelLinux

    From 5.0.0 · fixed in 5.10.252; From 5.11.0 · fixed in 5.15.202; From 5.16.0 · fixed in 6.1.165; From 6.2.0 · fixed in 6.6.128; From 6.7.0 · fixed in 6.12.75; From 6.13.0 · fixed in 6.18.16; From 6.19.0 · fixed in 6.19.6

References 8

git.kernel.org