CVE-2026-74573

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74573

Key Details

CVE	CVE-2026-74573
CVSS Score / Version	9.3 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74573
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74573

Source

Reference

NVD

CVE