SB20260507211 - Improper input validation in Linux kernel iommu intel driver

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Main Vulnerability Database SB20260507211

SB20260507211 - Improper input validation in Linux kernel iommu intel driver

Published: May 7, 2026

Security Bulletin ID SB20260507211
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper input validation (CVE-ID: CVE-2026-43130)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper device state validation in dev-IOTLB flushing logic when detaching or releasing a PCIe device in scalable mode after the device link goes down. A local user can trigger device teardown for an inaccessible PCIe device to cause a denial of service.

The issue can hard-lock the system while releasing resources after a VM fails to connect to the PCIe device.


Remediation

Install update from vendor's website.

References