Greg Kroah-Hartman has announced the release of the 3.8.1, 3.4.34, and 3.0.67 stable kernels. 3.8.1 and 3.4.34 contain the fix for the recent local privilege escalation, CVE-2013-1763 (3.0.x is not affected). As usual, there are also fixes throughout the tree and users should upgrade.
Read more at LWN