========================================================================== Ubuntu Security Notice USN-6444-1 October 19, 2023 linux, linux-aws, linux-aws-6.2, linux-azure, linux-azure-6.2, linux-azure-fde-6.2, linux-gcp, linux-gcp-6.2, linux-hwe-6.2, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-6.2, linux-oracle, linux-raspi, linux-starfive vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.04 - Ubuntu 22.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-lowlatency: Linux low latency kernel - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-starfive: Linux kernel for StarFive processors - linux-aws-6.2: Linux kernel for Amazon Web Services (AWS) systems - linux-azure-6.2: Linux kernel for Microsoft Azure cloud systems - linux-azure-fde-6.2: Linux kernel for Microsoft Azure CVM cloud systems - linux-gcp-6.2: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-6.2: Linux hardware enablement (HWE) kernel - linux-lowlatency-hwe-6.2: 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 23.04: linux-image-6.2.0-1007-starfive 6.2.0-1007.8 linux-image-6.2.0-1014-aws 6.2.0-1014.14 linux-image-6.2.0-1014-oracle 6.2.0-1014.14 linux-image-6.2.0-1015-azure 6.2.0-1015.15 linux-image-6.2.0-1015-kvm 6.2.0-1015.15 linux-image-6.2.0-1015-lowlatency 6.2.0-1015.15 linux-image-6.2.0-1015-lowlatency-64k 6.2.0-1015.15 linux-image-6.2.0-1015-raspi 6.2.0-1015.17 linux-image-6.2.0-1017-gcp 6.2.0-1017.19 linux-image-6.2.0-35-generic 6.2.0-35.35 linux-image-6.2.0-35-generic-64k 6.2.0-35.35 linux-image-6.2.0-35-generic-lpae 6.2.0-35.35 linux-image-aws 6.2.0.1014.15 linux-image-azure 6.2.0.1015.15 linux-image-gcp 6.2.0.1017.17 linux-image-generic 6.2.0.35.35 linux-image-generic-64k 6.2.0.35.35 linux-image-generic-lpae 6.2.0.35.35 linux-image-kvm 6.2.0.1015.15 linux-image-lowlatency 6.2.0.1015.15 linux-image-lowlatency-64k 6.2.0.1015.15 linux-image-oracle 6.2.0.1014.14 linux-image-raspi 6.2.0.1015.18 linux-image-raspi-nolpae 6.2.0.1015.18 linux-image-starfive 6.2.0.1007.10 linux-image-virtual 6.2.0.35.35 Ubuntu 22.04 LTS: linux-image-6.2.0-1014-aws 6.2.0-1014.14~22.04.1 linux-image-6.2.0-1015-azure 6.2.0-1015.15~22.04.1 linux-image-6.2.0-1015-azure-fde 6.2.0-1015.15~22.04.1.1 linux-image-6.2.0-1015-lowlatency 6.2.0-1015.15~22.04.1 linux-image-6.2.0-1015-lowlatency-64k 6.2.0-1015.15~22.04.1 linux-image-6.2.0-1017-gcp 6.2.0-1017.19~22.04.1 linux-image-6.2.0-35-generic 6.2.0-35.35~22.04.1 linux-image-6.2.0-35-generic-64k 6.2.0-35.35~22.04.1 linux-image-6.2.0-35-generic-lpae 6.2.0-35.35~22.04.1 linux-image-aws 6.2.0.1014.14~22.04.1 linux-image-azure 6.2.0.1015.15~22.04.1 linux-image-azure-fde 6.2.0.1015.15~22.04.1.12 linux-image-gcp 6.2.0.1017.19~22.04.1 linux-image-generic-64k-hwe-22.04 6.2.0.35.35~22.04.13 linux-image-generic-hwe-22.04 6.2.0.35.35~22.04.13 linux-image-generic-lpae-hwe-22.04 6.2.0.35.35~22.04.13 linux-image-lowlatency-64k-hwe-22.04 6.2.0.1015.15~22.04.12 linux-image-lowlatency-hwe-22.04 6.2.0.1015.15~22.04.12 linux-image-virtual-hwe-22.04 6.2.0.35.35~22.04.13 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-6444-1 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/6.2.0-35.35 https://launchpad.net/ubuntu/+source/linux-aws/6.2.0-1014.14 https://launchpad.net/ubuntu/+source/linux-azure/6.2.0-1015.15 https://launchpad.net/ubuntu/+source/linux-gcp/6.2.0-1017.19 https://launchpad.net/ubuntu/+source/linux-kvm/6.2.0-1015.15 https://launchpad.net/ubuntu/+source/linux-lowlatency/6.2.0-1015.15 https://launchpad.net/ubuntu/+source/linux-oracle/6.2.0-1014.14 https://launchpad.net/ubuntu/+source/linux-raspi/6.2.0-1015.17 https://launchpad.net/ubuntu/+source/linux-starfive/6.2.0-1007.8 https://launchpad.net/ubuntu/+source/linux-aws-6.2/6.2.0-1014.14~22.04.1 https://launchpad.net/ubuntu/+source/linux-azure-6.2/6.2.0-1015.15~22.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-6.2/6.2.0-1015.15~22.04.1.1 https://launchpad.net/ubuntu/+source/linux-gcp-6.2/6.2.0-1017.19~22.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-6.2/6.2.0-35.35~22.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.2/6.2.0-1015.15~22.04.1