CVE-2026-64591 (GCVE-0-2026-64591)
Vulnerability from cvelistv5
Published
2026-08-06 07:13
Modified
2026-08-17 04:58
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: ee312bb1052e45cbccaf6abac1012db9ca43150a
Version: 39c20c4e83b9f78988541d829aa34668904e54a0
Version: 39c20c4e83b9f78988541d829aa34668904e54a0
Version: 46461dabb95239aa05e31e247cd21151b8406642
Version: 6.18.20   ≤
Version: 6.19.10   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/intel/iommu.h",
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            "drivers/iommu/intel/svm.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "7.0"
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              "version": "7.1.4",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
            }
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Avoid WARNING in sva unbind path\n\nThe Intel IOMMU driver allows SVA on devices even if they do not support\nPCI/PRI. Commit 39c20c4e83b9 (\"iommu/vt-d: Only handle IOPF for SVA when\nPRI is supported\") modified the SVA bind path to allow this configuration\nby skipping IOPF enablement when PRI is missing. However, it failed to\nupdate the unbind path.\n\nThis creates an imbalance: the unbind path attempts to disable IOPF for\na device that never had it enabled, triggering a WARNING in\nintel_iommu_disable_iopf():\n\n WARNING: drivers/iommu/intel/iommu.c:3475 at intel_iommu_disable_iopf+0x4f/0x90d\n Call Trace:\n  \u003cTASK\u003e\n  blocking_domain_set_dev_pasid+0x50/0x70\n  iommu_detach_device_pasid+0x89/0xc0\n  iommu_sva_unbind_device+0x73/0x150\n  xe_vm_close_and_put+0x4d2/0x1200 [xe]\n\nFix this by bypassing IOPF operations for SVA domains on non-PRI hardware\nin both the bind and unbind paths."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:58:12.761Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d"
        },
        {
          "url": "https://git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e"
        },
        {
          "url": "https://git.kernel.org/stable/c/534b5f98ab7319d8004bbc7dab6481462243e883"
        }
      ],
      "title": "iommu/vt-d: Avoid WARNING in sva unbind path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64591",
    "datePublished": "2026-08-06T07:13:48.490Z",
    "dateReserved": "2026-07-19T15:36:31.798Z",
    "dateUpdated": "2026-08-17T04:58:12.761Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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