Ubuntu Security Notice 2678-1 – A flaw was discovered in the user space memory copying for the pipe iovecs in the Linux kernel. An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or potentially escalate their privileges. Daniel Borkmann reported a kernel crash in the Linux kernel’s BPF filter JIT optimization. A local attacker could exploit this flaw to cause a denial of service (system crash). Various other issues were also addressed.