/usr/include/linux/version.h is in linux-libc-dev 4.9.144-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | #define LINUX_VERSION_CODE 264592
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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