========================================================================== Ubuntu Security Notice USN-6386-1 September 19, 2023 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 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-azure: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gke: Linux kernel for Google Container Engine (GKE) systems - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-kvm: Linux kernel for cloud environments - linux-lowlatency: Linux low latency kernel - linux-nvidia: Linux kernel for NVIDIA systems - linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems - linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems - linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems - linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-gkeop-5.15: Linux kernel for Google Container Engine (GKE) systems - linux-hwe-5.15: Linux hardware enablement (HWE) kernel - linux-ibm-5.15: Linux kernel for IBM cloud systems - linux-lowlatency-hwe-5.15: Linux low latency kernel Details: Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-20588) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-40283) It was discovered that some network classifier implementations in the Linux kernel contained use-after-free vulnerabilities. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4128) Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2023-4569) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1028-gkeop 5.15.0-1028.33 linux-image-5.15.0-1033-nvidia 5.15.0-1033.33 linux-image-5.15.0-1033-nvidia-lowlatency 5.15.0-1033.33 linux-image-5.15.0-1038-ibm 5.15.0-1038.41 linux-image-5.15.0-1042-gcp 5.15.0-1042.50 linux-image-5.15.0-1042-gke 5.15.0-1042.47 linux-image-5.15.0-1042-kvm 5.15.0-1042.47 linux-image-5.15.0-1045-aws 5.15.0-1045.50 linux-image-5.15.0-1047-azure 5.15.0-1047.54 linux-image-5.15.0-1047-azure-fde 5.15.0-1047.54.1 linux-image-5.15.0-84-generic 5.15.0-84.93 linux-image-5.15.0-84-generic-64k 5.15.0-84.93 linux-image-5.15.0-84-generic-lpae 5.15.0-84.93 linux-image-5.15.0-84-lowlatency 5.15.0-84.93 linux-image-5.15.0-84-lowlatency-64k 5.15.0-84.93 linux-image-aws-lts-22.04 5.15.0.1045.44 linux-image-azure-fde-lts-22.04 5.15.0.1047.54.25 linux-image-azure-lts-22.04 5.15.0.1047.43 linux-image-gcp-lts-22.04 5.15.0.1042.38 linux-image-generic 5.15.0.84.81 linux-image-generic-64k 5.15.0.84.81 linux-image-generic-lpae 5.15.0.84.81 linux-image-gke 5.15.0.1042.41 linux-image-gke-5.15 5.15.0.1042.41 linux-image-gkeop 5.15.0.1028.27 linux-image-gkeop-5.15 5.15.0.1028.27 linux-image-ibm 5.15.0.1038.34 linux-image-kvm 5.15.0.1042.38 linux-image-lowlatency 5.15.0.84.86 linux-image-lowlatency-64k 5.15.0.84.86 linux-image-nvidia 5.15.0.1033.33 linux-image-nvidia-lowlatency 5.15.0.1033.33 linux-image-virtual 5.15.0.84.81 Ubuntu 20.04 LTS: linux-image-5.15.0-1028-gkeop 5.15.0-1028.33~20.04.1 linux-image-5.15.0-1038-ibm 5.15.0-1038.41~20.04.1 linux-image-5.15.0-1042-gcp 5.15.0-1042.50~20.04.1 linux-image-5.15.0-1045-aws 5.15.0-1045.50~20.04.1 linux-image-5.15.0-1047-azure 5.15.0-1047.54~20.04.1 linux-image-5.15.0-1047-azure-fde 5.15.0-1047.54~20.04.1.1 linux-image-5.15.0-84-generic 5.15.0-84.93~20.04.1 linux-image-5.15.0-84-generic-64k 5.15.0-84.93~20.04.1 linux-image-5.15.0-84-generic-lpae 5.15.0-84.93~20.04.1 linux-image-5.15.0-84-lowlatency 5.15.0-84.93~20.04.1 linux-image-5.15.0-84-lowlatency-64k 5.15.0-84.93~20.04.1 linux-image-aws 5.15.0.1045.50~20.04.33 linux-image-azure 5.15.0.1047.54~20.04.36 linux-image-azure-cvm 5.15.0.1047.54~20.04.36 linux-image-azure-fde 5.15.0.1047.54~20.04.1.25 linux-image-gcp 5.15.0.1042.50~20.04.1 linux-image-generic-64k-hwe-20.04 5.15.0.84.93~20.04.42 linux-image-generic-hwe-20.04 5.15.0.84.93~20.04.42 linux-image-generic-lpae-hwe-20.04 5.15.0.84.93~20.04.42 linux-image-gkeop-5.15 5.15.0.1028.33~20.04.24 linux-image-ibm 5.15.0.1038.41~20.04.10 linux-image-lowlatency-64k-hwe-20.04 5.15.0.84.93~20.04.39 linux-image-lowlatency-hwe-20.04 5.15.0.84.93~20.04.39 linux-image-oem-20.04 5.15.0.84.93~20.04.42 linux-image-oem-20.04b 5.15.0.84.93~20.04.42 linux-image-oem-20.04c 5.15.0.84.93~20.04.42 linux-image-oem-20.04d 5.15.0.84.93~20.04.42 linux-image-virtual-hwe-20.04 5.15.0.84.93~20.04.42 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-6386-1 CVE-2023-20588, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569 Package Information: https://launchpad.net/ubuntu/+source/linux/5.15.0-84.93 https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1045.50 https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1047.54 https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1047.54.1 https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1042.50 https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1042.47 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1028.33 https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1038.41 https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1042.47 https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-84.93 https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1033.33 https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1045.50~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1047.54~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1047.54~20.04.1.1 https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1042.50~20.04.1 https://launchpad.net/ubuntu/+source/linux-gkeop-5.15/5.15.0-1028.33~20.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-84.93~20.04.1 https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1038.41~20.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-84.93~20.04.1