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Linux Kernel DMA Direction Vulnerability in AMD KFD Migration

Vulnerability

A vulnerability in the Linux kernel's DMA mapping for AMD's Kernel Fusion Driver (KFD) migration has been addressed. The issue arose because the DMA migration direction was not aligned with the unmap direction, leading to warnings from the DMA core. This misalignment could cause improper synchronization during migration operations, potentially affecting performance. The vulnerability has been resolved by setting the DMA map direction to bidirectional, ensuring proper synchronization and alignment.

Impact

The vulnerability could lead to improper DMA synchronization during migration operations, causing potential performance issues.

Added: Jun 9, 2025, 7:46 PM
Updated: Jun 9, 2025, 7:46 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
4.0
remediation
0.0
relevance
0.0
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.