The latest stable version of the Linux kernel is:           2.6.26.3
The latest prepatch for the stable Linux kernel tree is:    2.6.27-rc5
The latest 2.4 version of the Linux kernel is:              2.4.36.6
The latest 2.2 version of the Linux kernel is:              2.2.26
The latest prepatch for the 2.2 Linux kernel tree is:       2.2.27-rc2
The latest -mm patch to the stable Linux kernels is:        2.6.27-rc1-mm1