Kernel release status
There's absolutely nothing interesting here, unless you want to play with KVM, or happened to be bitten by the bug with really old versions of the linker that made parts of entry.S just go away."
About 100 patches have been merged into the mainline git repository since -rc4, as of this writing. They are fixes, mostly in the architecture, ALSA, and networking subsystems.
The current -mm tree is 2.6.20-rc3-mm1. Recent changes to -mm include a bunch of KVM work (see below), another set of workqueue API changes, and the virtualization of struct user.
The current stable 2.6 kernel is 2.6.19.2, released on January 10. It contains a long list of fixes, including the fix for the file corruption problem and several with security implications.
For older kernels: 2.6.16.38-rc1 was released on
January 9 with a long list of fixes - many of which are
security-related.