Ubuntu Security Notice 2541-1 – The Linux kernel’s splice system call did not correctly validate its parameters. A local, unprivileged user could exploit this flaw to cause a denial of service (system crash). A flaw was discovered in how Thread Local Storage (TLS) is handled by the task switching function in the Linux kernel for x86_64 based machines. A local user could exploit this flaw to bypass the Address Space Layout Randomization (ASLR) protection mechanism. Various other issues were also addressed.