CVE-2026-74573

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommu/arm-smmu-v3-iommufd: Require exactly one Stream ID for a vDEVICE<br /> <br /> arm_vsmmu_vsid_to_sid() maps a guest&amp;#39;s vSID to a single physical Stream ID<br /> taken from master-&gt;streams[0], assuming a device has exactly one stream. A<br /> device with several streams gets only its first one mapped, so a guest vSID<br /> invalidation cannot reach the others&amp;#39; ATC and IOTLB entries; a device with<br /> none makes master-&gt;streams a ZERO_SIZE_PTR, read out of bounds.<br /> <br /> Add an arm_vsmmu_vdevice_init() op to reject the vDEVICE with -EOPNOTSUPP<br /> when master-&gt;num_streams is not one, rather than mapping it silently.