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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2025-40219

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-40219

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "3cddde484471c602bea04e6f384819d336a1ff84",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "7c37920c96b85ef4255a7acc795e99e63dd38d59",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "1047ca2d816994f31e1475e63e0c0b7825599747",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "97c18f074ff1c12d016a0753072a3afdfa0b9611",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "bea1d373098b22d7142da48750ce5526096425bc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "f3015627b6e9ddf85cfeaf42405b3c194dde2c36",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "18f9e9d150fccfa747875df6f0a9f606740762b3",
        "lessThan": "a5338e365c4559d7b4d7356116b0eb95b12e08d5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/pci/iov.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.252",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.202",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.165",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.128",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.75",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.16",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.6",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/pci/iov.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-40219

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#27086 · Revision 1
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Publisher date
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