Greg Kroah-Hartman has released the 5.11.3,
5.10.20, 5.4.102, 4.19.178, 4.14.223, 4.9.259, and 4.4.259 stable kernels. These are generally
enormous updates, with important changes throughout the kernel tree; users
should upgrade.

Source: LWN.net – A large pile of stable kernels