iommu/vt-d: Avoid WARNING in sva unbind path

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64591
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 08:16:34 UTC
Updated2026-08-06 08:16:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid WARNING in sva unbind path The Intel IOMMU driver allows SVA on devices even if they do not support PCI/PRI. Commit 39c20c4e83b9 ("iommu/vt-d: Only handle IOPF for SVA when PRI is supported") modified the SVA bind path to allow this configuration by skipping IOPF enablement when PRI is missing. However, it failed to update the unbind path. This creates an imbalance: the unbind path attempts to disable IOPF for a device that never had it enabled, triggering a WARNING in intel_iommu_disable_iopf(): WARNING: drivers/iommu/intel/iommu.c:3475 at intel_iommu_disable_iopf+0x4f/0x90d Call Trace: <TASK> blocking_domain_set_dev_pasid+0x50/0x70 iommu_detach_device_pasid+0x89/0xc0 iommu_sva_unbind_device+0x73/0x150 xe_vm_close_and_put+0x4d2/0x1200 [xe] Fix this by bypassing IOPF operations for SVA domains on non-PRI hardware in both the bind and unbind paths.

Risk And Classification

EPSS: 0.001640000 probability, percentile 0.060110000 (date 2026-08-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ee312bb1052e45cbccaf6abac1012db9ca43150a bb354384f40bb087e7c44f0f0743a23fc945f91d git Not specified
CNA Linux Linux affected 39c20c4e83b9f78988541d829aa34668904e54a0 477f8dec3b5ae54e8ef3c33bdd2257e47896512e git Not specified
CNA Linux Linux affected 39c20c4e83b9f78988541d829aa34668904e54a0 534b5f98ab7319d8004bbc7dab6481462243e883 git Not specified
CNA Linux Linux affected 46461dabb95239aa05e31e247cd21151b8406642 git Not specified
CNA Linux Linux affected 6.18.20 6.18.39 semver Not specified
CNA Linux Linux affected 6.19.10 6.20 semver Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/534b5f98ab7319d8004bbc7dab6481462243e883 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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