CVE-2025-40293
Our Analysis: Embedded
Our model has classified this vulnerability as relevant to Embedded Systems, helping your team prioritize efforts effectively.
Published Date
December 8, 2025
Last Modified
December 8, 2025
CVSS Vector
Not Available
Description
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Don't overflow during division for dirty tracking
If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow
to 0 and this triggers divide by 0.
In this case the index should just be 0, so reorganize things to divide
by shift and avoid hitting any overflows.