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CVE-2026-64591

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

In 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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version ee312bb1052e45cbccaf6abac1012db9ca43150a
Version < bb354384f40bb087e7c44f0f0743a23fc945f91d
Status affected
Version 39c20c4e83b9f78988541d829aa34668904e54a0
Version < 477f8dec3b5ae54e8ef3c33bdd2257e47896512e
Status affected
Version 39c20c4e83b9f78988541d829aa34668904e54a0
Version < 534b5f98ab7319d8004bbc7dab6481462243e883
Status affected
Version 46461dabb95239aa05e31e247cd21151b8406642
Status affected
Version 6.18.20
Version < 6.18.39
Status affected
Version 6.19.10
Version < 6.20
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 7.0
Status affected
Version 0
Version < 7.0
Status unaffected
Version <= 6.18.*
Version 6.18.39
Status unaffected
Version <= 7.1.*
Version 7.1.4
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.06
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d
https://git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e
https://git.kernel.org/stable/c/534b5f98ab7319d8004bbc7dab6481462243e883