CVE-2026-89448

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().

Score

CVSS 3.1 9.3 Critical

Status

Received - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-11

Last modified

2026-10-19

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/579eb867d3da63f3b5e32f235925e1daa7ec70d0
• https://git.kernel.org/stable/c/aaeb81241e802c86be69394f72d49fde3f861fbb
• https://git.kernel.org/stable/c/45705a6bfdb283f7b3b509010fd617b72f942537
• https://git.kernel.org/stable/c/87bc611c6c98a41c00feb7b06b0c297dd141a2ae
• https://git.kernel.org/stable/c/607432b2618b61df81134be0ef2562b8300c1216