The 2017 claim is based on the vulnerability having been introduced in this commit in the second half of 2017: https://git.kernel.org/pub/scm/linux/kernel/git/t

The 2017 claim is based on the vulnerability having been introduced in this commit in the second half of 2017: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=72548b093ee3 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin... The details will depend on whether the kernel is a newer release or a maintenance version of an older release.