Linux kernel version 4.9.309 is now available:
Full source: https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.309.tar.xz
Patch: https://cdn.kernel.org/pub/linux/kernel/v4.x/patch-4.9.309.xz
PGP Signature: https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.309.tar.sign
You can view the summary of the changes at the following URL:
https://git.kernel.org/stable/ds/v4.9.309/v4.9.308