Ubuntu Security Notice 3072-1 – Kangjie Lu discovered an information leak in the Reliable Datagram Sockets implementation in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory. Yue Cao et al discovered a flaw in the TCP implementation’s handling of challenge acks in the Linux kernel. A remote attacker could use this to cause a denial of service or inject content into an TCP stream. Various other issues were also addressed.