iommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-45894 concerns a vulnerability related to the iommu/vt-d component where the Present bit is not cleared before tearing down a PASID entry. The provided information does not include technical details beyond this or any specific impact scenarios. There is no CVSS score or detailed vendor advisory available. No known exploits in the wild have been reported. The affected products include Microsoft and Azure Linux 3. 0. Patch status is not confirmed from the available data.
AI Analysis
Technical Summary
This vulnerability involves the iommu/vt-d subsystem, specifically the failure to clear the Present bit before removing a PASID entry. The PASID (Process Address Space ID) is used in IOMMU virtualization contexts to manage address spaces. Improper handling of this bit could potentially lead to inconsistent state or security issues in address translation or device isolation. However, no further technical details or exploitation methods are provided in the source data.
Potential Impact
The impact is not explicitly described in the available information. Without detailed technical or vendor advisory data, the exact consequences of this vulnerability remain unclear. No known exploits have been reported, and no CVSS score is assigned.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No specific mitigation or workaround information is provided in the available data.
iommu/vt-d: Clear Present bit before tearing down PASID entry
Description
CVE-2026-45894 concerns a vulnerability related to the iommu/vt-d component where the Present bit is not cleared before tearing down a PASID entry. The provided information does not include technical details beyond this or any specific impact scenarios. There is no CVSS score or detailed vendor advisory available. No known exploits in the wild have been reported. The affected products include Microsoft and Azure Linux 3. 0. Patch status is not confirmed from the available data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the iommu/vt-d subsystem, specifically the failure to clear the Present bit before removing a PASID entry. The PASID (Process Address Space ID) is used in IOMMU virtualization contexts to manage address spaces. Improper handling of this bit could potentially lead to inconsistent state or security issues in address translation or device isolation. However, no further technical details or exploitation methods are provided in the source data.
Potential Impact
The impact is not explicitly described in the available information. Without detailed technical or vendor advisory data, the exact consequences of this vulnerability remain unclear. No known exploits have been reported, and no CVSS score is assigned.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No specific mitigation or workaround information is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-45894
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a18ab92e29bf47b5028969a
Added to database: 5/28/2026, 8:54:42 PM
Last enriched: 5/28/2026, 9:13:42 PM
Last updated: 5/29/2026, 4:39:26 AM
Views: 2
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