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 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().
CVE-2026-89448
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89448
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5d990b627537e59a3a2f039ff588a4750e9c1a6a",
"lessThan": "579eb867d3da63f3b5e32f235925e1daa7ec70d0",
"versionType": "git"
},
{
"status": "affected",
"version": "5d990b627537e59a3a2f039ff588a4750e9c1a6a",
"lessThan": "aaeb81241e802c86be69394f72d49fde3f861fbb",
"versionType": "git"
},
{
"status": "affected",
"version": "5d990b627537e59a3a2f039ff588a4750e9c1a6a",
"lessThan": "45705a6bfdb283f7b3b509010fd617b72f942537",
"versionType": "git"
},
{
"status": "affected",
"version": "5d990b627537e59a3a2f039ff588a4750e9c1a6a",
"lessThan": "87bc611c6c98a41c00feb7b06b0c297dd141a2ae",
"versionType": "git"
},
{
"status": "affected",
"version": "5d990b627537e59a3a2f039ff588a4750e9c1a6a",
"lessThan": "607432b2618b61df81134be0ef2562b8300c1216",
"versionType": "git"
}
],
"programFiles": [
"drivers/iommu/intel/dmar.c",
"drivers/iommu/intel/iommu.c",
"drivers/iommu/intel/iommu.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.33"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.33",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iommu/intel/dmar.c",
"drivers/iommu/intel/iommu.c",
"drivers/iommu/intel/iommu.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89448
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #34982 · Revision 1
- Added to Heist Feed
- Publisher date