Ubuntu Security Notice USN-5970-1

Ubuntu Security Notice 5970-1 - It was discovered that the KVM VMX implementation in the Linux kernel did not properly handle indirect branch prediction isolation between L1 and L2 VMs. An attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. It was discovered that a race condition existed in the Xen network backend driver in the Linux kernel when handling dropped packets in certain circumstances. An attacker could use …

backend denial of service driver handling host information isolation kernel linux linux kernel network notice packets prediction race condition security security notice sensitive information service ubuntu usn vms vmx xen