CVE-2025-40293 — iommufd: Don't overflow during division for dirty tracking
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->bit…
Published: 2025-12-08 · CVSS: Unscored
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7