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CVE-2026-89448

Last refreshed2026-10-17

Status: UPDATED  |  Advisory ID: CVE-2026-89448

Key Details

CVECVE-2026-89448
CVSS Score / Version
9.3 (Critical) / CVSS v3.1
Updated2026-10-16
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

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

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

tboot_force_iommu().

Fix it by checking tboot in detect_intel_iommu(). (NVD)

What to Do

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

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-89448
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-89448

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