CVE-2013-1827 on Ubuntu 12.04 LTS (precise) - medium.
Description:
net/dccp/ccid.h in the Linux kernel before 3.5.4 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) by leveraging the CAP_NET_ADMIN capability for a certain (1) sender or (2) receiver getsockopt call. Mathias Krause discover an error in Linux kernel's Datagram Congestion Control Protocol (DCCP) Congestion Control Identifier (CCID) use. A local attack could exploit this flaw to cause a denial of service (crash) and potentially escalate privileges if the user can mmap page 0.