Linux Kernel Vulnerability Affecting Hisilicon Acceleration Component

CVE-2025-38158

What is CVE-2025-38158?

A vulnerability within the Linux kernel's handling of Hisilicon acceleration components has been identified, manifesting as incorrect DMA addresses after migration. This issue impacts guest kernel-mode encryption services, leading to failures during operations. The root cause lies in the incorrect assembly of addresses from hardware register data. Additionally, even after initial fixes, migrating guests from older kernel versions to newer ones can result in erroneous data. To mitigate this, a check for an old magic number is necessary to update the DMA address and ensure correct functionality post-migration.

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