CVE-2026-43368 is a vulnerability in the Linux kernel's drm/i915 driver where a potential overflow of the shmem scatterlist length can occur when handling GEM shmem objects of size 4 GB or more. This overflow can cause premature termination of the object's backing pages, leading to memory handling issues. The flaw arises because the unsigned int length attribute of a scatterlist may overflow if the total byte length allocated to a single scatterlist reaches or exceeds 4 GB. The issue has been fixed by ensuring that the byte length of any single scatterlist does not exceed the maximum segment size.