CVE-2026-31765 addresses a vulnerability in the Linux kernel's AMDGPU driver related to mismatched reserved trap size and allocation size on systems using 64KB pages. The hardcoded AMDGPU_VA_RESERVED_TRAP_SIZE was 8KB, while the allocation size (KFD_CWSR_TBA_TMA_SIZE) became 128KB on 64KB page systems, causing kernel crashes during certain GPU operations. The patch changes the reserved trap size to 64KB and aligns allocation size with the AMD GPU page size, preventing kernel crashes.