========================================================================== Ubuntu Security Notice USN-6446-1 October 20, 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-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15,linux-nvidia, linux-oracle, linux-raspi 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-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi 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-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: Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker in a guest VM could use this to cause a denial of service (host system crash) or possibly execute arbitrary code. (CVE-2023-34319) Bien Pham discovered that the netfiler subsystem in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. A local user could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4244) Kyle Zeng discovered that the networking stack implementation in the Linux kernel did not properly validate skb object size in certain conditions. An attacker could use this cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-42752) Kyle Zeng discovered that the netfiler subsystem in the Linux kernel did not properly calculate array offsets, leading to a out-of-bounds write vulnerability. A local user could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-42753) Kyle Zeng discovered that the IPv4 Resource Reservation Protocol (RSVP) classifier implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash). Please note that kernel packet classifier support for RSVP has been removed to resolve this vulnerability. (CVE-2023-42755) Kyle Zeng discovered that the netfilter subsystem in the Linux kernel contained a race condition in IP set operations in certain situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-42756) Bing-Jhong Billy Jheng discovered that the Unix domain socket implementation in the Linux kernel contained a race condition in certain situations, 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-2023-4622) Budimir Markovic discovered that the qdisc implementation in the Linux kernel did not properly validate inner classes, leading to a use-after-free vulnerability. A local user could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4623) Alex Birnberg discovered that the netfilter subsystem in the Linux kernel did not properly validate register length, leading to an out-of- bounds write vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-4881) It was discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel did not properly handle network packets in certain conditions, 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-2023-4921) Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle removal of rules from chain bindings in certain circumstances, leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-5197) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1031-gkeop 5.15.0-1031.37 linux-image-5.15.0-1039-nvidia 5.15.0-1039.39 linux-image-5.15.0-1039-nvidia-lowlatency 5.15.0-1039.39 linux-image-5.15.0-1041-ibm 5.15.0-1041.44 linux-image-5.15.0-1041-raspi 5.15.0-1041.44 linux-image-5.15.0-1045-gcp 5.15.0-1045.53 linux-image-5.15.0-1045-gke 5.15.0-1045.50 linux-image-5.15.0-1045-kvm 5.15.0-1045.50 linux-image-5.15.0-1046-oracle 5.15.0-1046.52 linux-image-5.15.0-1048-aws 5.15.0-1048.53 linux-image-5.15.0-1050-azure 5.15.0-1050.57 linux-image-5.15.0-1050-azure-fde 5.15.0-1050.57.1 linux-image-5.15.0-87-generic 5.15.0-87.97 linux-image-5.15.0-87-generic-64k 5.15.0-87.97 linux-image-5.15.0-87-generic-lpae 5.15.0-87.97 linux-image-5.15.0-87-lowlatency 5.15.0-87.96 linux-image-5.15.0-87-lowlatency-64k 5.15.0-87.96 linux-image-aws-lts-22.04 5.15.0.1048.47 linux-image-azure-fde-lts-22.04 5.15.0.1050.57.28 linux-image-azure-lts-22.04 5.15.0.1050.46 linux-image-gcp-lts-22.04 5.15.0.1045.41 linux-image-generic 5.15.0.87.84 linux-image-generic-64k 5.15.0.87.84 linux-image-generic-lpae 5.15.0.87.84 linux-image-gke 5.15.0.1045.44 linux-image-gke-5.15 5.15.0.1045.44 linux-image-gkeop 5.15.0.1031.30 linux-image-gkeop-5.15 5.15.0.1031.30 linux-image-ibm 5.15.0.1041.37 linux-image-kvm 5.15.0.1045.41 linux-image-lowlatency 5.15.0.87.89 linux-image-lowlatency-64k 5.15.0.87.89 linux-image-nvidia 5.15.0.1039.39 linux-image-nvidia-lowlatency 5.15.0.1039.39 linux-image-oracle 5.15.0.1046.41 linux-image-oracle-lts-22.04 5.15.0.1046.41 linux-image-raspi 5.15.0.1041.39 linux-image-raspi-nolpae 5.15.0.1041.39 linux-image-virtual 5.15.0.87.84 Ubuntu 20.04 LTS: linux-image-5.15.0-1041-ibm 5.15.0-1041.44~20.04.1 linux-image-5.15.0-1048-aws 5.15.0-1048.53~20.04.1 linux-image-5.15.0-1050-azure 5.15.0-1050.57~20.04.1 linux-image-5.15.0-1050-azure-fde 5.15.0-1050.57~20.04.1.1 linux-image-5.15.0-87-generic 5.15.0-87.97~20.04.1 linux-image-5.15.0-87-generic-64k 5.15.0-87.97~20.04.1 linux-image-5.15.0-87-generic-lpae 5.15.0-87.97~20.04.1 linux-image-5.15.0-87-lowlatency 5.15.0-87.96~20.04.1 linux-image-5.15.0-87-lowlatency-64k 5.15.0-87.96~20.04.1 linux-image-aws 5.15.0.1048.53~20.04.36 linux-image-azure 5.15.0.1050.57~20.04.39 linux-image-azure-cvm 5.15.0.1050.57~20.04.39 linux-image-azure-fde 5.15.0.1050.57~20.04.1.28 linux-image-generic-64k-hwe-20.04 5.15.0.87.97~20.04.45 linux-image-generic-hwe-20.04 5.15.0.87.97~20.04.45 linux-image-generic-lpae-hwe-20.04 5.15.0.87.97~20.04.45 linux-image-ibm 5.15.0.1041.44~20.04.13 linux-image-lowlatency-64k-hwe-20.04 5.15.0.87.96~20.04.42 linux-image-lowlatency-hwe-20.04 5.15.0.87.96~20.04.42 linux-image-oem-20.04 5.15.0.87.97~20.04.45 linux-image-oem-20.04b 5.15.0.87.97~20.04.45 linux-image-oem-20.04c 5.15.0.87.97~20.04.45 linux-image-oem-20.04d 5.15.0.87.97~20.04.45 linux-image-virtual-hwe-20.04 5.15.0.87.97~20.04.45 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-6446-1 CVE-2023-34319, CVE-2023-4244, CVE-2023-42752, CVE-2023-42753, CVE-2023-42755, CVE-2023-42756, CVE-2023-4622, CVE-2023-4623, CVE-2023-4881, CVE-2023-4921, CVE-2023-5197 Package Information: https://launchpad.net/ubuntu/+source/linux/5.15.0-87.97 https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1048.53 https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1050.57 https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1050.57.1 https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1045.53 https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1045.50 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1031.37 https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1041.44 https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1045.50 https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-87.96 https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1039.39 https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1046.52 https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1041.44 https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1048.53~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1050.57~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1050.57~20.04.1.1 https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-87.97~20.04.1 https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1041.44~20.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-87.96~20.04.1