ubuntu-usn

USN-4303-1: Linux kernel vulnerability linux, linux-aws, linux-kvm vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 16.04 LTS Summary The system could be made to expose sensitive information. Software Description linux – Linux kernel linux-aws – Linux kernel for Amazon Web Services (AWS) systems linux-kvm – Linux kernel for cloud environments Details Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS linux-image-4.4.0-1068-kvm – 4.4.0-1068.75 linux-image-4.4.0-1104-aws – 4.4.0-1104.115 linux-image-4.4.0-176-generic – 4.4.0-176.206 linux-image-4.4.0-176-generic-lpae – 4.4.0-176.206 linux-image-4.4.0-176-lowlatency – 4.4.0-176.206 linux-image-4.4.0-176-powerpc-e500mc – 4.4.0-176.206 linux-image-4.4.0-176-powerpc-smp – 4.4.0-176.206 linux-image-4.4.0-176-powerpc64-emb – 4.4.0-176.206 [ more… ]

USN-4303-2: Linux kernel (HWE) vulnerability linux-lts-xenial, linux-aws vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 ESM Summary The system could be made to expose sensitive information. Software Description linux-aws – Linux kernel for Amazon Web Services (AWS) systems linux-lts-xenial – Linux hardware enablement kernel from Xenial for Trusty Details USN-4303-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM. Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information. Update instructions The problem can be corrected by updating your system to [ more… ]

USN-4302-1: Linux kernel vulnerabilities linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Ubuntu 16.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description linux – Linux kernel linux-aws – Linux kernel for Amazon Web Services (AWS) systems linux-gke-4.15 – Linux kernel for Google Container Engine (GKE) systems linux-kvm – Linux kernel for cloud environments linux-raspi2 – Linux kernel for Raspberry Pi 2 linux-snapdragon – Linux kernel for Snapdragon processors linux-aws-hwe – Linux kernel for Amazon Web Services (AWS-HWE) systems linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems linux-hwe – Linux hardware enablement (HWE) kernel Details Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources [ more… ]

USN-4301-1: Linux kernel vulnerabilities linux-aws-5.0, linux-gcp, linux-gke-5.0, linux-oracle-5.0 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description linux-aws-5.0 – Linux kernel for Amazon Web Services (AWS) systems linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems linux-gke-5.0 – Linux kernel for Google Container Engine (GKE) systems linux-oracle-5.0 – Linux kernel for Oracle Cloud systems Details It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise mishandle them. An attacker in a guest VM could use this to expose sensitive information (read memory from another guest VM). (CVE-2019-3016) Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could [ more… ]

USN-4300-1: Linux kernel vulnerabilities linux, linux-aws, linux-gcp, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-raspi2-5.3 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 19.10 Ubuntu 18.04 LTS Summary Several security issues were fixed in the Linux kernel. Software Description linux – Linux kernel linux-aws – Linux kernel for Amazon Web Services (AWS) systems linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems linux-kvm – Linux kernel for cloud environments linux-oracle – Linux kernel for Oracle Cloud systems linux-raspi2 – Linux kernel for Raspberry Pi 2 linux-gcp-5.3 – Linux kernel for Google Cloud Platform (GCP) systems linux-gke-5.3 – Linux kernel for Google Container Engine (GKE) systems linux-hwe – Linux hardware enablement (HWE) kernel linux-raspi2-5.3 – Linux kernel for Raspberry Pi 2 Details It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB [ more… ]