========================================================================== Ubuntu Security Notice USN-5621-1 September 21, 2022
linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-dell300x, linux-gcp, linux-gcp-4.15, lnux-hwe, inux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM 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-azure-4.15: Linux kernel for Microsoft Azure Cloud systems - linux-dell300x: Linux kernel for Dell 300x platforms - linux-gcp-4.15: 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 systems - linux-snapdragon: Linux kernel for Qualcomm 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: It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33655) Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter subsystem in the Linux kernel did not properly handle rules that truncated packets below the packet header size. When such rules are in place, a remote attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-36946) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1053-dell300x 4.15.0-1053.58 linux-image-4.15.0-1106-oracle 4.15.0-1106.117 linux-image-4.15.0-1119-raspi2 4.15.0-1119.127 linux-image-4.15.0-1127-kvm 4.15.0-1127.132 linux-image-4.15.0-1136-gcp 4.15.0-1136.152 linux-image-4.15.0-1137-snapdragon 4.15.0-1137.147 linux-image-4.15.0-1141-aws 4.15.0-1141.152 linux-image-4.15.0-1151-azure 4.15.0-1151.166 linux-image-4.15.0-193-generic 4.15.0-193.204 linux-image-4.15.0-193-generic-lpae 4.15.0-193.204 linux-image-4.15.0-193-lowlatency 4.15.0-193.204 linux-image-aws-lts-18.04 4.15.0.1141.141 linux-image-azure-lts-18.04 4.15.0.1151.121 linux-image-dell300x 4.15.0.1053.53 linux-image-gcp-lts-18.04 4.15.0.1136.152 linux-image-generic 4.15.0.193.178 linux-image-generic-lpae 4.15.0.193.178 linux-image-kvm 4.15.0.1127.120 linux-image-lowlatency 4.15.0.193.178 linux-image-oracle-lts-18.04 4.15.0.1106.113 linux-image-raspi2 4.15.0.1119.116 linux-image-snapdragon 4.15.0.1137.138 linux-image-virtual 4.15.0.193.178 Ubuntu 16.04 ESM: linux-image-4.15.0-1106-oracle 4.15.0-1106.117~16.04.1 linux-image-4.15.0-1136-gcp 4.15.0-1136.152~16.04.1 linux-image-4.15.0-1141-aws-hwe 4.15.0-1141.152~16.04.1 linux-image-4.15.0-193-generic 4.15.0-193.204~16.04.1 linux-image-4.15.0-193-lowlatency 4.15.0-193.204~16.04.1 linux-image-aws-hwe 4.15.0.1141.128 linux-image-gcp 4.15.0.1136.130 linux-image-generic-hwe-16.04 4.15.0.193.180 linux-image-gke 4.15.0.1136.130 linux-image-lowlatency-hwe-16.04 4.15.0.193.180 linux-image-oem 4.15.0.193.180 linux-image-oracle 4.15.0.1106.90 linux-image-virtual-hwe-16.04 4.15.0.193.180 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-5621-1 CVE-2021-33655, CVE-2022-36946 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-193.204 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1141.152 https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1151.166 https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1053.58 https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1136.152 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1127.132 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1106.117 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1119.127 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1137.147
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