========================================================================== Ubuntu Security Notice USN-6090-1 May 18, 2023 linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-oracle-5.15 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-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-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-gke-5.15: Linux kernel for Google Container Engine (GKE) systems - linux-oracle-5.15: Linux kernel for Oracle Cloud systems Details: It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. (CVE-2022-27672) Zheng Wang discovered that the Intel i915 graphics driver in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-3707) Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did not properly implement speculative execution barriers in usercopy functions in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2023-0459) It was discovered that the TLS subsystem in the Linux kernel contained a type confusion vulnerability in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-1075) It was discovered that the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel contained a type confusion vulnerability in some situations. An attacker could use this to cause a denial of service (system crash). (CVE-2023-1078) Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel did not properly initialize some data structures. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2023-1513) It was discovered that the Android Binder IPC subsystem in the Linux kernel did not properly validate inputs in some 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-2023-20938) It was discovered that a use-after-free vulnerability existed in the iSCSI TCP implementation in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-2162) It was discovered that the NET/ROM protocol implementation in the Linux kernel contained a race condition in some 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-2023-32269) Duoming Zhou discovered that a race condition existed in the infrared receiver/transceiver driver in the Linux kernel, leading to a use-after- free vulnerability. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-1118) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1020-gkeop 5.15.0-1020.25 linux-image-5.15.0-1033-gke 5.15.0-1033.38 linux-image-5.15.0-1034-gcp 5.15.0-1034.42+1 linux-image-gcp-lts-22.04 5.15.0.1034.30 linux-image-gke 5.15.0.1033.32 linux-image-gke-5.15 5.15.0.1033.32 linux-image-gkeop 5.15.0.1020.19 linux-image-gkeop-5.15 5.15.0.1020.19 Ubuntu 20.04 LTS: linux-image-5.15.0-1033-gcp 5.15.0-1033.41~20.04.1 linux-image-5.15.0-1033-gke 5.15.0-1033.38~20.04.1 linux-image-5.15.0-1035-oracle 5.15.0-1035.41~20.04.1 linux-image-gcp 5.15.0.1033.41~20.04.1 linux-image-gke-5.15 5.15.0.1033.38~20.04.1 linux-image-oracle 5.15.0.1035.41~20.04.1 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-6090-1 CVE-2022-27672, CVE-2022-3707, CVE-2023-0459, CVE-2023-1075, CVE-2023-1078, CVE-2023-1118, CVE-2023-1513, CVE-2023-20938, CVE-2023-2162, CVE-2023-32269 Package Information: https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1034.42 https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1033.38 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1020.25 https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1033.41~20.04.1 https://launchpad.net/ubuntu/+source/linux-gke-5.15/5.15.0-1033.38~20.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1035.41~20.04.1