CVE-2026-64591
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():
Fix this by bypassing IOPF operations for SVA domains on non-PRI hardware in both the bind and unbind paths.
Detalles técnicos trazas, registros y código del informe original
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]
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.22%
- Percentil entre todas las CVEs puntuadas: 11
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-64591",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"product": "Linux",
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"status": "affected",
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{
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{
"status": "affected",
"version": "6.18.20",
"lessThan": "6.18.39",
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},
{
"status": "affected",
"version": "6.19.10",
"lessThan": "6.20",
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"programFiles": [
"drivers/iommu/intel/iommu.h",
"drivers/iommu/intel/svm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
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"version": "0",
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{
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"versionType": "semver",
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{
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"version": "7.1.4",
"versionType": "semver",
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{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
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"programFiles": [
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],
"defaultStatus": "affected"
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}
],
"published": "2026-08-06T08:16:34.497",
"references": [
{
"url": "https://git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"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 <TASK>\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."
}
],
"lastModified": "2026-08-17T05:18:05.550",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}