--- title: 'USN-4184-1: Linux kernel vulnerabilities | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-4184-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-4184-1 --- # USN-4184-1: Linux kernel vulnerabilities Publication date 13 November 2019 Overview Several security issues were fixed in the Linux kernel. Releases [19.04](https://ubuntu.com/security/notices?release=disco) [18.04 LTS](https://ubuntu.com/security/notices?release=bionic) --- Open side navigation ## Packages * [linux](https://ubuntu.com/security/cves?package=linux) - Linux kernel * [linux-aws](https://ubuntu.com/security/cves?package=linux-aws) - Linux kernel for Amazon Web Services (AWS) systems * [linux-azure](https://ubuntu.com/security/cves?package=linux-azure) - Linux kernel for Microsoft Azure Cloud systems * [linux-gcp](https://ubuntu.com/security/cves?package=linux-gcp) - Linux kernel for Google Cloud Platform (GCP) systems * [linux-gke-5.0](https://ubuntu.com/security/cves?package=linux-gke-5.0) - Linux kernel for Google Container Engine (GKE) systems * [linux-hwe](https://ubuntu.com/security/cves?package=linux-hwe) - Linux hardware enablement (HWE) kernel * [linux-kvm](https://ubuntu.com/security/cves?package=linux-kvm) - Linux kernel for cloud environments * [linux-oem-osp1](https://ubuntu.com/security/cves?package=linux-oem-osp1) - Linux kernel for OEM processors * [linux-oracle](https://ubuntu.com/security/cves?package=linux-oracle) - Linux kernel for Oracle Cloud systems * [linux-raspi2](https://ubuntu.com/security/cves?package=linux-raspi2) - Linux kernel for Raspberry Pi 2 ## Details Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. ([CVE-2019-11135](https://ubuntu.com/security/CVE-2019-11135)) It was discovered that the Intel i915 graphics chipsets allowed userspace to modify page table entries via writes to MMIO from the Blitter Command Streamer and expose kernel memory information. A local attacker could use this to expose sensitive information or possibly elevate privileges. ([CVE-2019-0155](https://ubuntu.com/security/CVE-2019-0155)) Deepak Gupta discovered that on certain Intel... --- Show more ## Update instructions Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154) issues requires corresponding microcode and graphics firmware updates respectively. After a standard system update you need to reboot your computer to make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 19.04 disco | [linux-image-5.0.0-1007-oracle](https://launchpad.net/ubuntu/+source/linux-signed-oracle) –  [5.0.0-1007.12](https://launchpad.net/ubuntu/+source/linux-signed-oracle/5.0.0-1007.12) | | | | [linux-image-5.0.0-1021-aws](https://launchpad.net/ubuntu/+source/linux-aws) –  [5.0.0-1021.24](https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1021.24) | | | | [linux-image-5.0.0-1022-kvm](https://launchpad.net/ubuntu/+source/linux-kvm) –  [5.0.0-1022.24](https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1022.24) | | | | [linux-image-5.0.0-1022-raspi2](https://launchpad.net/ubuntu/+source/linux-raspi2) –  [5.0.0-1022.23](https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1022.23) | | | | [linux-image-5.0.0-1025-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure) –  [5.0.0-1025.27](https://launchpad.net/ubuntu/+source/linux-signed-azure/5.0.0-1025.27) | | | | [linux-image-5.0.0-1025-gcp](https://launchpad.net/ubuntu/+source/linux-signed-gcp) –  [5.0.0-1025.26](https://launchpad.net/ubuntu/+source/linux-signed-gcp/5.0.0-1025.26) | | | | [linux-image-5.0.0-35-generic](https://launchpad.net/ubuntu/+source/linux-signed) –  [5.0.0-35.38](https://launchpad.net/ubuntu/+source/linux-signed/5.0.0-35.38) | | | | [linux-image-5.0.0-35-generic-lpae](https://launchpad.net/ubuntu/+source/linux) –  [5.0.0-35.38](https://launchpad.net/ubuntu/+source/linux/5.0.0-35.38) | | | | [linux-image-5.0.0-35-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed) –  [5.0.0-35.38](https://launchpad.net/ubuntu/+source/linux-signed/5.0.0-35.38) | | | | [linux-image-aws](https://launchpad.net/ubuntu/+source/linux-meta-aws) –  [5.0.0.1021.23](https://launchpad.net/ubuntu/+source/linux-meta-aws/5.0.0.1021.23) | | | | [linux-image-azure](https://launchpad.net/ubuntu/+source/linux-meta-azure) –  [5.0.0.1025.25](https://launchpad.net/ubuntu/+source/linux-meta-azure/5.0.0.1025.25) | | | | [linux-image-gcp](https://launchpad.net/ubuntu/+source/linux-meta-gcp) –  [5.0.0.1025.50](https://launchpad.net/ubuntu/+source/linux-meta-gcp/5.0.0.1025.50) | | | | [linux-image-generic](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.0.0.35.37](https://launchpad.net/ubuntu/+source/linux-meta/5.0.0.35.37) | | | | [linux-image-generic-lpae](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.0.0.35.37](https://launchpad.net/ubuntu/+source/linux-meta/5.0.0.35.37) | | | | [linux-image-gke](https://launchpad.net/ubuntu/+source/linux-meta-gcp) –  [5.0.0.1025.50](https://launchpad.net/ubuntu/+source/linux-meta-gcp/5.0.0.1025.50) | | | | [linux-image-kvm](https://launchpad.net/ubuntu/+source/linux-meta-kvm) –  [5.0.0.1022.23](https://launchpad.net/ubuntu/+source/linux-meta-kvm/5.0.0.1022.23) | | | | [linux-image-lowlatency](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.0.0.35.37](https://launchpad.net/ubuntu/+source/linux-meta/5.0.0.35.37) | | | | [linux-image-oracle](https://launchpad.net/ubuntu/+source/linux-meta-oracle) –  [5.0.0.1007.33](https://launchpad.net/ubuntu/+source/linux-meta-oracle/5.0.0.1007.33) | | | | [linux-image-raspi2](https://launchpad.net/ubuntu/+source/linux-meta-raspi2) –  [5.0.0.1022.20](https://launchpad.net/ubuntu/+source/linux-meta-raspi2/5.0.0.1022.20) | | | | [linux-image-virtual](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.0.0.35.37](https://launchpad.net/ubuntu/+source/linux-meta/5.0.0.35.37) | | | | 18.04 LTS bionic | [linux-image-5.0.0-1025-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure) –  [5.0.0-1025.27~18.04.1](https://launchpad.net/ubuntu/+source/linux-signed-azure/5.0.0-1025.27~18.04.1) | | | | [linux-image-5.0.0-1025-gcp](https://launchpad.net/ubuntu/+source/linux-signed-gcp) –  [5.0.0-1025.26~18.04.1](https://launchpad.net/ubuntu/+source/linux-signed-gcp/5.0.0-1025.26~18.04.1) | | | | [linux-image-5.0.0-1025-gke](https://launchpad.net/ubuntu/+source/linux-signed-gke-5.0) –  [5.0.0-1025.26~18.04.1](https://launchpad.net/ubuntu/+source/linux-signed-gke-5.0/5.0.0-1025.26~18.04.1) | | | | [linux-image-5.0.0-1027-oem-osp1](https://launchpad.net/ubuntu/+source/linux-signed-oem-osp1) –  [5.0.0-1027.31](https://launchpad.net/ubuntu/+source/linux-signed-oem-osp1/5.0.0-1027.31) | | | | [linux-image-5.0.0-35-generic](https://launchpad.net/ubuntu/+source/linux-signed-hwe) –  [5.0.0-35.38~18.04.1](https://launchpad.net/ubuntu/+source/linux-signed-hwe/5.0.0-35.38~18.04.1) | | | | [linux-image-5.0.0-35-generic-lpae](https://launchpad.net/ubuntu/+source/linux-hwe) –  [5.0.0-35.38~18.04.1](https://launchpad.net/ubuntu/+source/linux-hwe/5.0.0-35.38~18.04.1) | | | | [linux-image-5.0.0-35-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed-hwe) –  [5.0.0-35.38~18.04.1](https://launchpad.net/ubuntu/+source/linux-signed-hwe/5.0.0-35.38~18.04.1) | | | | [linux-image-azure](https://launchpad.net/ubuntu/+source/linux-meta-azure) –  [5.0.0.1025.36](https://launchpad.net/ubuntu/+source/linux-meta-azure/5.0.0.1025.36) | | | | [linux-image-gcp](https://launchpad.net/ubuntu/+source/linux-meta-gcp) –  [5.0.0.1025.29](https://launchpad.net/ubuntu/+source/linux-meta-gcp/5.0.0.1025.29) | | | | [linux-image-generic-hwe-18.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  [5.0.0.35.93](https://launchpad.net/ubuntu/+source/linux-meta-hwe/5.0.0.35.93) | | | | [linux-image-generic-lpae-hwe-18.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  [5.0.0.35.93](https://launchpad.net/ubuntu/+source/linux-meta-hwe/5.0.0.35.93) | | | | [linux-image-gke-5.0](https://launchpad.net/ubuntu/+source/linux-meta-gke-5.0) –  [5.0.0.1025.14](https://launchpad.net/ubuntu/+source/linux-meta-gke-5.0/5.0.0.1025.14) | | | | [linux-image-lowlatency-hwe-18.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  [5.0.0.35.93](https://launchpad.net/ubuntu/+source/linux-meta-hwe/5.0.0.35.93) | | | | [linux-image-oem-osp1](https://launchpad.net/ubuntu/+source/linux-meta-oem-osp1) –  [5.0.0.1027.31](https://launchpad.net/ubuntu/+source/linux-meta-oem-osp1/5.0.0.1027.31) | | | | [linux-image-snapdragon-hwe-18.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  [5.0.0.35.93](https://launchpad.net/ubuntu/+source/linux-meta-hwe/5.0.0.35.93) | | | | [linux-image-virtual-hwe-18.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  [5.0.0.35.93](https://launchpad.net/ubuntu/+source/linux-meta-hwe/5.0.0.35.93) | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * * [CVE-2019-17666](https://ubuntu.com/security/CVE-2019-17666) * [CVE-2019-17056](https://ubuntu.com/security/CVE-2019-17056) * [CVE-2019-17055](https://ubuntu.com/security/CVE-2019-17055) * [CVE-2019-17054](https://ubuntu.com/security/CVE-2019-17054) * [CVE-2019-17053](https://ubuntu.com/security/CVE-2019-17053) * [CVE-2019-17052](https://ubuntu.com/security/CVE-2019-17052) * [CVE-2019-15793](https://ubuntu.com/security/CVE-2019-15793) * [CVE-2019-15792](https://ubuntu.com/security/CVE-2019-15792) * [CVE-2019-15791](https://ubuntu.com/security/CVE-2019-15791) --- Show 5 more references ## Related notices * [USN-4188-1](https://ubuntu.com/security/notices/USN-4188-1) * [USN-4187-1](https://ubuntu.com/security/notices/USN-4187-1) * [USN-4186-1](https://ubuntu.com/security/notices/USN-4186-1) * [USN-4186-2](https://ubuntu.com/security/notices/USN-4186-2) * [USN-4186-3](https://ubuntu.com/security/notices/USN-4186-3) * [USN-4185-2](https://ubuntu.com/security/notices/USN-4185-2) * [USN-4185-1](https://ubuntu.com/security/notices/USN-4185-1) * [USN-4185-3](https://ubuntu.com/security/notices/USN-4185-3) * [USN-4184-2](https://ubuntu.com/security/notices/USN-4184-2) * [USN-4183-1](https://ubuntu.com/security/notices/USN-4183-1) --- Show 3 more references --- Have additional questions? [Talk to a member of the team ›](https://wiki.ubuntu.com/SecurityTeam/FAQ?_ga=2.242131138.1744859116.1742138161-1500419473.1726851136&_gl=1*161muja*_gcl_au*MzUyMTIzNjI1LjE3MzYyNDQ4NTE.#Contact)