Kernel Panic Vulnerability in Linux Kernel Affects AMD GPU Driver

CVE-2026-46220

What is CVE-2026-46220?

A vulnerability in the Linux kernel's AMD GPU driver allows unprivileged users to trigger fatal kernel panics through misaligned fence addresses via crafted DRM_IOCTL_AMDGPU_CS submissions. The problematic assertions in the sdma_v4_0_ring_emit_fence() method originally caused the kernel to crash. These assertions have been replaced with logging mechanisms that prevent crashes while still handling driver bugs appropriately. This highlights the importance of validating submissions at the IOCTL stage, rather than at the emission callback, to avoid critical disturbances in the kernel functionality.

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