Linux Kernel Vulnerability in Intel Graphics Drivers Affecting Multiple Devices

CVE-2026-43477

What is CVE-2026-43477?

A vulnerability in the Intel Linux kernel graphics drivers can lead to system hangs if variable refresh rate (VRR) timings are configured incorrectly. This typically occurs when TRANS_VRR_VMAX or FLIPLINE are written before enabling TRANS_DDI_FUNC_CTL. Reproductions have been noted particularly when using specific hardware setups, such as Dell XPS 7390 with external display docks. It is crucial for users to ensure that VRR timings are configured after the enabling of TRANS_DDI_FUNC_CTL to prevent this issue from occurring.

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