In the Linux kernel, the following vulnerability has been resolved: ARM: fix cacheflush with PAN It seems that the cacheflush syscall got broken when PAN for LPAE was implemented. User access was not enabled around the cache maintenance instructions, causing them to fault.
https://git.kernel.org/stable/c/e6960a2ed49c9a25357817535f7cc50594a58604
https://git.kernel.org/stable/c/ca29cfcc4a21083d671522ad384532e28a43f033