net/sctp/sm_make_chunk.c in the Linux kernel before 2.6.34, when addip_enable and auth_enable are used, does not consider the amount of zero padding during calculation of chunk lengths for (1) INIT and (2) INIT ACK chunks, which allows remote attackers to cause a denial of service (OOPS) via crafted packet data.
http://rhn.redhat.com/errata/RHSA-2011-0927.html
http://openwall.com/lists/oss-security/2011/04/11/4