Kernel Memory Mapping Vulnerability in Linux by Habanalabs

CVE-2025-40311

What is CVE-2025-40311?

A vulnerability in the Linux kernel affects the memory management of coherent memory when using Habanalabs' acceleration components. The issue arises when IOMMU is enabled, leading to improper address handling from the vmalloc range. If not addressed correctly, this can result in kernel crashes due to an incorrect mapping without the VM_MIXEDMAP flag. The resolution involves ensuring that when vmalloc addresses are utilized, the corresponding VMA is properly set up to prevent any inconsistencies, thus enhancing overall kernel stability.

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