========================================================================== Ubuntu Security Notice USN-5970-1 March 23, 2023 linux, linux-aws, linux-azure, linux-gcp, linux-ibm, linux-kvm, linux-lowlatency, linux-oracle, linux-raspi vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.10 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-ibm: Linux kernel for IBM cloud 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 Details: It was discovered that the KVM VMX implementation in the Linux kernel did not properly handle indirect branch prediction isolation between L1 and L2 VMs. An attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. (CVE-2022-2196) It was discovered that a race condition existed in the Xen network backend driver in the Linux kernel when handling dropped packets in certain circumstances. An attacker could use this to cause a denial of service (kernel deadlock). (CVE-2022-42328, CVE-2022-42329) Gerald Lee discovered that the USB Gadget file system implementation in the Linux kernel contained a race condition, leading to a use-after-free vulnerability in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-4382) José Oliveira and Rodrigo Branco discovered that the prctl syscall implementation in the Linux kernel did not properly protect against indirect branch prediction attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-0045) It was discovered that a use-after-free vulnerability existed in the Advanced Linux Sound Architecture (ALSA) subsystem. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-0266) It was discovered that the io_uring subsystem in the Linux kernel contained 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-2023-0469) It was discovered that the CIFS network file system implementation in the Linux kernel contained a user-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-1195) It was discovered that the RNDIS USB driver in the Linux kernel contained an integer overflow vulnerability. A local attacker with physical access could plug in a malicious USB device to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-23559) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.10: linux-image-5.19.0-1015-raspi 5.19.0-1015.22 linux-image-5.19.0-1015-raspi-nolpae 5.19.0-1015.22 linux-image-5.19.0-1019-gcp 5.19.0-1019.21 linux-image-5.19.0-1019-ibm 5.19.0-1019.21 linux-image-5.19.0-1019-oracle 5.19.0-1019.22 linux-image-5.19.0-1020-kvm 5.19.0-1020.21 linux-image-5.19.0-1021-lowlatency 5.19.0-1021.22 linux-image-5.19.0-1021-lowlatency-64k 5.19.0-1021.22 linux-image-5.19.0-1022-aws 5.19.0-1022.23 linux-image-5.19.0-1022-azure 5.19.0-1022.23 linux-image-5.19.0-38-generic 5.19.0-38.39 linux-image-5.19.0-38-generic-64k 5.19.0-38.39 linux-image-5.19.0-38-generic-lpae 5.19.0-38.39 linux-image-aws 5.19.0.1022.19 linux-image-azure 5.19.0.1022.18 linux-image-gcp 5.19.0.1019.16 linux-image-generic 5.19.0.38.34 linux-image-generic-64k 5.19.0.38.34 linux-image-generic-lpae 5.19.0.38.34 linux-image-ibm 5.19.0.1019.16 linux-image-kvm 5.19.0.1020.17 linux-image-lowlatency 5.19.0.1021.17 linux-image-lowlatency-64k 5.19.0.1021.17 linux-image-oracle 5.19.0.1019.16 linux-image-raspi 5.19.0.1015.14 linux-image-raspi-nolpae 5.19.0.1015.14 linux-image-virtual 5.19.0.38.34 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-5970-1 CVE-2022-2196, CVE-2022-42328, CVE-2022-42329, CVE-2022-4382, CVE-2023-0045, CVE-2023-0266, CVE-2023-0469, CVE-2023-1195, CVE-2023-23559 Package Information: https://launchpad.net/ubuntu/+source/linux/5.19.0-38.39 https://launchpad.net/ubuntu/+source/linux-aws/5.19.0-1022.23 https://launchpad.net/ubuntu/+source/linux-azure/5.19.0-1022.23 https://launchpad.net/ubuntu/+source/linux-gcp/5.19.0-1019.21 https://launchpad.net/ubuntu/+source/linux-ibm/5.19.0-1019.21 https://launchpad.net/ubuntu/+source/linux-kvm/5.19.0-1020.21 https://launchpad.net/ubuntu/+source/linux-lowlatency/5.19.0-1021.22 https://launchpad.net/ubuntu/+source/linux-oracle/5.19.0-1019.22 https://launchpad.net/ubuntu/+source/linux-raspi/5.19.0-1015.22