In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Block PASID attachment to nested domain with dirty tracking Kernel… (CVE-2026-53372)
A vulnerability in the Linux kernel's iommu/vt-d subsystem related to PASID attachment to nested domains with dirty tracking has been resolved. The kernel lacked support for dirty tracking on nested domains attached to PASID, which could cause loss of dirty pages if the nesting parent domain was configured for dirty tracking. The fix blocks PASID attachment early in such cases to prevent this issue.
AI Analysis
Technical Summary
The Linux kernel vulnerability CVE-2026-53372 involves the iommu/vt-d component where the kernel did not support dirty tracking on nested domains attached to PASID. Without this support, if the nesting parent domain had dirty tracking enabled, dirty pages could be lost due to failure to track modifications properly. The resolution involves blocking PASID attachment to nested domains when the parent domain has dirty tracking configured, preventing the loss of dirty pages.
Potential Impact
The vulnerability could lead to loss of dirty pages in memory management when using nested domains with PASID and dirty tracking enabled. This could affect system stability or data integrity related to memory operations in affected kernel configurations. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to block PASID attachment to nested domains with dirty tracking enabled on the parent domain. Users should update to the fixed kernel version once available. Patch status is not explicitly stated; check the official Linux kernel advisories or vendor updates for the specific fixed versions and apply them accordingly.
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Block PASID attachment to nested domain with dirty tracking Kernel… (CVE-2026-53372)
Description
A vulnerability in the Linux kernel's iommu/vt-d subsystem related to PASID attachment to nested domains with dirty tracking has been resolved. The kernel lacked support for dirty tracking on nested domains attached to PASID, which could cause loss of dirty pages if the nesting parent domain was configured for dirty tracking. The fix blocks PASID attachment early in such cases to prevent this issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability CVE-2026-53372 involves the iommu/vt-d component where the kernel did not support dirty tracking on nested domains attached to PASID. Without this support, if the nesting parent domain had dirty tracking enabled, dirty pages could be lost due to failure to track modifications properly. The resolution involves blocking PASID attachment to nested domains when the parent domain has dirty tracking configured, preventing the loss of dirty pages.
Potential Impact
The vulnerability could lead to loss of dirty pages in memory management when using nested domains with PASID and dirty tracking enabled. This could affect system stability or data integrity related to memory operations in affected kernel configurations. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to block PASID attachment to nested domains with dirty tracking enabled on the parent domain. Users should update to the fixed kernel version once available. Patch status is not explicitly stated; check the official Linux kernel advisories or vendor updates for the specific fixed versions and apply them accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-h5mw-rxh6-g2x3
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53372"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27af2a4a8d5989132b02
Added to database: 07/19/2026, 19:38:23 UTC
Last enriched: 07/19/2026, 20:26:26 UTC
Last updated: 07/20/2026, 07:00:24 UTC
Views: 13
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