linux - security update

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation or denial-of-service.

• CVE-2013-4312
  Tetsuo Handa discovered that it is possible for a process to open
  far more files than the process’ limit leading to denial-of-service
  conditions.
• CVE-2015-7566
  Ralf Spenneberg of OpenSource Security reported that the visor
  driver crashes when a specially crafted USB device without bulk-out
  endpoint is detected.
• CVE-2015-8767
  An SCTP denial-of-service was discovered which can be triggered by a
  local attacker during a heartbeat timeout event after the 4-way
  handshake.
• CVE-2016-0723
  A use-after-free vulnerability was discovered in the TIOCGETD ioctl.
  A local attacker could use this flaw for denial-of-service.
• CVE-2016-0728
  The Perception Point research team discovered a use-after-free
  vulnerability in the keyring facility, possibly leading to local
  privilege escalation.

For the stable distribution (jessie), these problems have been fixed in
version 3.16.7-ckt20-1+deb8u3.

We recommend that you upgrade your linux packages.