SB20260912337 - Configuration in Linux kernel iommu intel driver
Published: September 12, 2026
Security Bulletin ID
SB20260912337
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Configuration (CVE-ID: CVE-2026-89448)
CWE-ID: CWE-16 - Configuration
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause access control services to remain disabled while the IOMMU is forced on.
The vulnerability exists due to improper configuration handling in detect_intel_iommu() when tboot forces the IOMMU on after ACS was not requested. A local privileged user can configure the system to disable ACS to cause access control services to remain disabled while the IOMMU is forced on.
Remediation
Install update from vendor's website.