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Ubuntu 20.10: USN-4689-4 Critical: NVIDIA Kernel Issues Fixed

Several security issues were fixed in NVIDIA graphics drivers.. =========================================================================Ubuntu Security Notice USN-4689-4 January 21, 2021 linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.4, linux-hwe-5.8, linux-oracle update ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Several security issues were fixed in NVIDIA graphics drivers. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-hwe-5.8: Linux hardware enablement (HWE) kernel - linux-hwe-5.4: Linux hardware enablement (HWE) kernel Details: USN-4689-3 fixed vulnerabilities in the NVIDIA server graphics drivers. This update provides the corresponding updates for the NVIDIA Linux DKMS kernel modules. Original advisory details: It was discovered that the NVIDIA GPU display driver for the Linux kernel contained a vulnerability that allowed user-mode clients to access legacy privileged APIs. A local attacker could use this to cause a denial of service or escalate privileges. (CVE-2021-1052) It was discovered that the NVIDIA GPU display driver for the Linux kernel did not properly validate a pointer received from userspace in some situations. A local attacker could use this to cause a denial of service. (CVE-2021-1053) Xinyuan Lyu discovered that the NVIDIA GPU display driver for the Linux kernel did not properly restrict device-level GPU isolation. A local attacker could use this to cause a denial of service or possibly expose sensitive information. (CVE-2021-1056) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu20.10: linux-image-5.8.0-1017-oracle 5.8.0-1017.18 linux-image-5.8.0-1019-azure 5.8.0-1019.21 linux-image-5.8.0-1019-gcp 5.8.0-1019.20 linux-image-5.8.0-1020-aws 5.8.0-1020.22 linux-image-5.8.0-40-generic 5.8.0-40.45 linux-image-5.8.0-40-lowlatency 5.8.0-40.45 linux-image-aws 5.8.0.1020.22 linux-image-azure 5.8.0.1019.19 linux-image-gcp 5.8.0.1019.19 linux-image-generic 5.8.0.40.44 linux-image-gke 5.8.0.1019.19 linux-image-lowlatency 5.8.0.40.44 linux-image-oem-20.04 5.8.0.40.44 linux-image-oracle 5.8.0.1017.17 linux-image-virtual 5.8.0.40.44 Ubuntu 20.04 LTS: linux-image-5.4.0-64-generic 5.4.0-64.72 linux-image-5.4.0-64-lowlatency 5.4.0-64.72 linux-image-5.8.0-40-generic 5.8.0-40.45~20.04.1 linux-image-5.8.0-40-lowlatency 5.8.0-40.45~20.04.1 linux-image-generic 5.4.0.64.67 linux-image-generic-hwe-20.04 5.8.0.40.45~20.04.25 linux-image-generic-lpae-hwe-20.04 5.8.0.40.45~20.04.25 linux-image-lowlatency 5.4.0.64.67 linux-image-lowlatency-hwe-20.04 5.8.0.40.45~20.04.25 linux-image-oem 5.4.0.64.67 linux-image-oem-osp1 5.4.0.64.67 linux-image-virtual 5.4.0.64.67 linux-image-virtual-hwe-20.04 5.8.0.40.45~20.04.25 Ubuntu 18.04 LTS: linux-image-4.15.0-134-generic 4.15.0-134.138 linux-image-4.15.0-134-lowlatency 4.15.0-134.138 linux-image-5.4.0-64-generic 5.4.0-64.72~18.04.1 linux-image-5.4.0-64-lowlatency 5.4.0-64.72~18.04.1 linux-image-generic 4.15.0.134.121 linux-image-generic-hwe-18.04 5.4.0.64.72~18.04.59 linux-image-lowlatency 4.15.0.134.121 linux-image-lowlatency-hwe-18.04 5.4.0.64.72~18.04.59 linux-image-oem 5.4.0.64.72~18.04.59 linux-image-oem-osp1 5.4.0.64.72~18.04.59 linux-image-virtual 4.15.0.134.121 linux-image-virtual-hwe-18.04 5.4.0.64.72~18.04.59 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://ubuntu.com/security/notices/USN-4689-1 CVE-2021-1052, CVE-2021-1053 Package Information: https://launchpad.net/ubuntu/+source/linux/5.8.0-40.45 https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1020.22 https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1019.21 https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1019.20 https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1017.18 https://launchpad.net/ubuntu/+source/linux/5.4.0-64.72 https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-40.45~20.04.1 https://launchpad.net/ubuntu/+source/linux/4.15.0-134.138 https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-64.72~18.04.1 . Essential NVIDIA driver enhancements in Ubuntu tackle various vulnerabilities impacting kernel performance.. NVIDIA Driver Security, Kernel Update, Ubuntu Linux Updates. . Severity: Critical. LinuxSecurity.com Team

Jan 20, 2021 •Critical Ubuntu