Kernel Vulnerability in Linux Affecting AMD Display Drivers

CVE-2026-53285

What is CVE-2026-53285?

A vulnerability in the Linux kernel affects the AMD display drivers, specifically in the way phantom-plane allocations are handled. The issue arises when the dcn32_validate_bandwidth function incorrectly manages the dc_state_create_phantom_plane memory allocation while preemption is disabled. This flaw can potentially lead to a system crash, as it violates the constraints expected in the kernel environment, particularly within the FPU-enabled region. To mitigate this issue, the allocation needs to be correctly wrapped with the DC_RUN_WITH_PREEMPTION_ENABLED macro.

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