CVE
DEBIAN-CVE-2026-74573
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 phy...
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3-iommufd: Require exactly one Stream ID for a vDEVICE armvsmmuvsidtosid() 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 ZEROSIZEPTR, read out of bounds. Add an armvsmmuvdeviceinit() op to reject the vDEVICE with -EOPNOTSUPP when master->numstreams is not one, rather than mapping it silently.
Package Versions Affected
Package Version
patch Availability
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
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C
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0
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3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
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Related Resources
No items found.
References
https://security-tracker.debian.org/tracker/CVE-2026-74573