The changelog for kernel 2.6.25.11 includes just a single entry, however, it seems to be so important that the Kernel Stable Team urgently advises users to upgrade the kernel on 64 bit multiple user systems.
Can't make it to the 17th USENIX Security Symposium?
No Problem. Just register for the live streaming and follow the tutorials and technical sessions from your own PC. After the live transmission, you can view repeats of the talks, whenever and as often as you like.