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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-74573

iommu/arm-smmu-v3-iommufd: Require exactly one Stream ID for a vDEVICE

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d68beb276ba26cec47350a6d468e967673ee0c56 to < 3808bab5d95ae79e333e11f6a73d178e084c645daffected
  • d68beb276ba26cec47350a6d468e967673ee0c56 to < 0acbc621341aca4eb94d9c2f43e1ab273ff088f0affected
  • d68beb276ba26cec47350a6d468e967673ee0c56 to < c3b8ee84a965058b41275069d4696f37a8b14bf6affected

Linux Linux

Default version status: affected

  • 6.13affected
  • 0 to < 6.13unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References