========================================================================= Ubuntu Security Notice USN-4412-1 July 02, 2020 linux, linux-azure, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-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-azure: Linux kernel for Microsoft Azure Cloud 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-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe: Linux hardware enablement (HWE) kernel - linux-oracle-5.3: Linux kernel for Oracle Cloud systems Details: Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service (system crash). (CVE-2020-10711) It was discovered that the SCSI generic (sg) driver in the Linux kernel did not properly handle certain error conditions correctly. A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2020-12770) It was discovered that the USB Gadget device driver in the Linux kernel did not validate arguments passed from configfs in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-13143) Dmitry Vyukov discovered that the SELinux netlink security hook in the Linux kernel did not validate messages in some situations. A privileged attacker could use this to bypass SELinux netlink restrictions. (CVE-2020-10751) It was discovered that the KVM implementation in the Linux kernel did not properly deallocate memory on initialization for some processors. A local attacker could possibly use this to cause a denial of service. (CVE-2020-12768) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10: linux-image-5.3.0-1024-kvm 5.3.0-1024.26 linux-image-5.3.0-1028-oracle 5.3.0-1028.30 linux-image-5.3.0-1030-gcp 5.3.0-1030.32 linux-image-5.3.0-1031-azure 5.3.0-1031.32 linux-image-5.3.0-62-generic 5.3.0-62.56 linux-image-5.3.0-62-generic-lpae 5.3.0-62.56 linux-image-5.3.0-62-lowlatency 5.3.0-62.56 linux-image-5.3.0-62-snapdragon 5.3.0-62.56 linux-image-azure 5.3.0.1031.49 linux-image-gcp 5.3.0.1030.40 linux-image-generic 5.3.0.62.52 linux-image-generic-lpae 5.3.0.62.52 linux-image-gke 5.3.0.1030.40 linux-image-kvm 5.3.0.1024.22 linux-image-lowlatency 5.3.0.62.52 linux-image-oracle 5.3.0.1028.43 linux-image-snapdragon 5.3.0.62.52 linux-image-virtual 5.3.0.62.52 Ubuntu 18.04 LTS: linux-image-5.3.0-1028-oracle 5.3.0-1028.30~18.04.1 linux-image-5.3.0-1030-gcp 5.3.0-1030.32~18.04.1 linux-image-5.3.0-62-generic 5.3.0-62.56~18.04.1 linux-image-5.3.0-62-generic-lpae 5.3.0-62.56~18.04.1 linux-image-5.3.0-62-lowlatency 5.3.0-62.56~18.04.1 linux-image-gcp 5.3.0.1030.24 linux-image-generic-hwe-18.04 5.3.0.62.115 linux-image-generic-lpae-hwe-18.04 5.3.0.62.115 linux-image-gkeop-5.3 5.3.0.62.115 linux-image-lowlatency-hwe-18.04 5.3.0.62.115 linux-image-oracle 5.3.0.1028.25 linux-image-snapdragon-hwe-18.04 5.3.0.62.115 linux-image-virtual-hwe-18.04 5.3.0.62.115 After a standard system update you need to reboot your computer to make all the necessary changes. 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. References: https://usn.ubuntu.com/4412-1 CVE-2020-10711, CVE-2020-10751, CVE-2020-12768, CVE-2020-12770, CVE-2020-13143 Package Information: https://launchpad.net/ubuntu/+source/linux/5.3.0-62.56 https://launchpad.net/ubuntu/+source/linux-azure/5.3.0-1031.32 https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1030.32 https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1024.26 https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1028.30 https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1030.32~18.04.1 https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-62.56~18.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1028.30~18.04.1