{"apiVersion":"1.0","identifier":"CVE-2026-74573","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.","publishedAt":"2026-08-15T13:18:02","lastModifiedAt":"2026-08-17T06:19:55","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74573","cvssScore":9.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","epssProbability":0.00131,"riskScore":0.94,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74573","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74573","en":"https://www.redsauce.net/en/cves/CVE-2026-74573","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74573","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74573","de":"https://www.redsauce.net/de/cves/CVE-2026-74573","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74573","el":"https://www.redsauce.net/el/cves/CVE-2026-74573"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74573"}}