A previously unknown timing side channel in the syncfs system call lets an unprivileged process infer other processes' disk-write activity, enabling covert channels and website/video/app fingerprinting on Linux, Android, and Windows/WSL systems.
DramaQueen: Revisiting side channels in DRAM,
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I Know What You Sync: Covert and Side Channel Attacks on File Systems via syncfs
A previously unknown timing side channel in the syncfs system call lets an unprivileged process infer other processes' disk-write activity, enabling covert channels and website/video/app fingerprinting on Linux, Android, and Windows/WSL systems.