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CVE

CVE-2026-89448

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

CVE-2026-89448

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

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 detectinteliommu()

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

tbootforceiommu().

Fix it by checking tboot in detectinteliommu().

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/45705a6bfdb283f7b3b509010fd617b72f942537, https://git.kernel.org/stable/c/579eb867d3da63f3b5e32f235925e1daa7ec70d0, https://git.kernel.org/stable/c/607432b2618b61df81134be0ef2562b8300c1216, https://git.kernel.org/stable/c/87bc611c6c98a41c00feb7b06b0c297dd141a2ae, https://git.kernel.org/stable/c/aaeb81241e802c86be69394f72d49fde3f861fbb, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89448.json, https://nvd.nist.gov/vuln/detail/CVE-2026-89448, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.3

CVSS Score
0
10

Basic Information

Base CVSS
9.3
EPSS Probability
0.00142%
EPSS Percentile
0.02996%
Introduced Version
5d990b627537e59a3a2f039ff588a4750e9c1a6a,2.6.33,6.7.0,6.13.0,6.19.0,0
Fix Available
607432b2618b61df81134be0ef2562b8300c1216,6.6.157,6.12.109,6.18.50,7.2.4,6.12.111-1~deb12u1,6.12.111-1,0:6.12.0-207.111.5.1.el10uek,0:6.12.0-207.111.5.1.el9uek

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