{"api_version":"1","generated_at":"2026-08-07T05:56:33+00:00","cve":"CVE-2026-64591","urls":{"html":"https://cve.report/CVE-2026-64591","api":"https://cve.report/api/cve/CVE-2026-64591.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64591","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64591"},"summary":{"title":"iommu/vt-d: Avoid WARNING in sva unbind path","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-06 08:16:34","updated_at":"2026-08-06 08:16:34"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d","name":"https://git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e","name":"https://git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/534b5f98ab7319d8004bbc7dab6481462243e883","name":"https://git.kernel.org/stable/c/534b5f98ab7319d8004bbc7dab6481462243e883","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64591","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64591","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ee312bb1052e45cbccaf6abac1012db9ca43150a bb354384f40bb087e7c44f0f0743a23fc945f91d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 39c20c4e83b9f78988541d829aa34668904e54a0 477f8dec3b5ae54e8ef3c33bdd2257e47896512e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 39c20c4e83b9f78988541d829aa34668904e54a0 534b5f98ab7319d8004bbc7dab6481462243e883 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 46461dabb95239aa05e31e247cd21151b8406642 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.20 6.18.39 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19.10 6.20 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64591","cve":"CVE-2026-64591","epss":"0.001640000","percentile":"0.060110000","score_date":"2026-08-06","updated_at":"2026-08-07 00:14:18"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iommu/intel/iommu.h","drivers/iommu/intel/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bb354384f40bb087e7c44f0f0743a23fc945f91d","status":"affected","version":"ee312bb1052e45cbccaf6abac1012db9ca43150a","versionType":"git"},{"lessThan":"477f8dec3b5ae54e8ef3c33bdd2257e47896512e","status":"affected","version":"39c20c4e83b9f78988541d829aa34668904e54a0","versionType":"git"},{"lessThan":"534b5f98ab7319d8004bbc7dab6481462243e883","status":"affected","version":"39c20c4e83b9f78988541d829aa34668904e54a0","versionType":"git"},{"status":"affected","version":"46461dabb95239aa05e31e247cd21151b8406642","versionType":"git"},{"lessThan":"6.18.39","status":"affected","version":"6.18.20","versionType":"semver"},{"lessThan":"6.20","status":"affected","version":"6.19.10","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/iommu/intel/iommu.h","drivers/iommu/intel/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.18.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-08-06T07:13:48.490Z","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":"2026-08-06T07:13:48.490Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-06 08:16:34","lastModifiedDate":"2026-08-06 08:16:34","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64591","Ordinal":"1","Title":"iommu/vt-d: Avoid WARNING in sva unbind path","CVE":"CVE-2026-64591","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64591","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"iommu/vt-d: Avoid WARNING in sva unbind path"}]}}}