CVE-2026-64591iommu/vt-d: Avoid WARNING in sva unbind path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ee312bb1052e45cbccaf6abac1012db9ca43150a before bb354384f40bb087e7c44f0f0743a23fc945f91d; from 39c20c4e83b9f78988541d829aa34668904e54a0 before 477f8dec3b5ae54e8ef3c33bdd2257e47896512e; from 39c20c4e83b9f78988541d829aa34668904e54a0 before 534b5f98ab7319d8004bbc7dab6481462243e883; 46461dabb95239aa05e31e247cd21151b8406642; from 6.18.20 before 6.18.39; from 6.19.10 before 6.20 | CNA record |
References
- https://git.kernel.org/stable/c/bb354384f40bb087e7c44f0f0743a23fc945f91d
- https://git.kernel.org/stable/c/477f8dec3b5ae54e8ef3c33bdd2257e47896512e
- https://git.kernel.org/stable/c/534b5f98ab7319d8004bbc7dab6481462243e883
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.