CVE-2026-89451: fallo en Linux
iommu/sva: Set handle->dev before the SVA handle is visible
Publicada el
3Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackepss 0.2%
probabilidad de explotación
0.2%top 90% de las CVE
explotación observada
noninguna fuente lo reporta
In the Linux kernel, the following vulnerability has been resolved:
iommu/sva: Set handle->dev before the SVA handle is visible
iommu_attach_device_pasid() installs the new SVA attach handle in the
group PASID lookup before iommu_sva_bind_device() returns. A concurrent
bind can therefore find and reuse the same handle after iommu_sva_lock is
dropped.
handle->dev was initialized after dropping iommu_sva_lock. This leaves a
window where a racing bind can return a handle whose dev pointer is still
NULL. A subsequent iommu_sva_unbind_device() can then dereference it via
handle->dev->iommu_group.
Initialize handle->dev before releasing iommu_sva_lock so any visible SVA
handle is fully initialized.
Productos afectados
Linux · LinuxCVEs relacionadas — Linux
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