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THREAT OPS › Threat News › [NVD] CVE-2026-89448 (CRITICAL 9.3) — In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Force requesting ACS when tboot is enabled Currently the conditions of requesting ACS in detect_intel_iommu() don't include tboot, leading to a possible misconfiguration with ACS disabled (e.g. due

[NVD] CVE-2026-89448 (CRITICAL 9.3) — In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Force requesting ACS when tboot is enabled Currently the conditions of requesting ACS in detect_intel_iommu() don't include tboot, leading to a possible misconfiguration with ACS disabled (e.g. due

mednvdPublished 2026-09-11

CVE-2026-89448 CVSS: 9.3 CRITICAL Published: 2026-09-11T20:19:25.347

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Force requesting ACS when tboot is enabled

Currently the conditions of requesting ACS in detect_intel_iommu() don't include tboot, leading to a possible misconfiguration with ACS disabled (e.g. due to user opts) while iommu is later forced on by tb

Indicators of compromise

CVE-2026-89448cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-89448