========================================================================== Ubuntu Security Notice USN-5987-1 March 29, 2023 linux-gke, linux-gke-5.15, linux-ibm, linux-kvm 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-gke: Linux kernel for Google Container Engine (GKE) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-kvm: Linux kernel for cloud environments - linux-gke-5.15: Linux kernel for Google Container Engine (GKE) 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 use-after-free vulnerability existed in the SGI GRU driver in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-3424) Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-36280) Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel did not properly perform reference counting 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-2022-41218) 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) It was discovered that the NTFS file system implementation in the Linux kernel did not properly validate attributes in certain situations, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-48423) It was discovered that the NTFS file system implementation in the Linux kernel did not properly validate attributes in certain situations, leading to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-48424) 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 the KSMBD implementation in the Linux kernel did not properly validate buffer lengths, leading to a heap-based buffer overflow. A remote attacker could possibly use this to cause a denial of service (system crash). (CVE-2023-0210) 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) Kyle Zeng discovered that the class-based queuing discipline 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-2023-23454) Kyle Zeng discovered that the ATM VC queuing discipline 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-2023-23455) 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) It was discovered that the NTFS file system implementation in the Linux kernel did not properly handle a loop termination condition, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-26606) Wei Chen discovered that the DVB USB AZ6027 driver in the Linux kernel contained a null pointer dereference when handling certain messages from user space. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-28328) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1027-ibm 5.15.0-1027.30 linux-image-5.15.0-1030-gke 5.15.0-1030.35 linux-image-5.15.0-1030-kvm 5.15.0-1030.35 linux-image-gke 5.15.0.1030.29 linux-image-gke-5.15 5.15.0.1030.29 linux-image-ibm 5.15.0.1027.23 linux-image-kvm 5.15.0.1030.26 Ubuntu 20.04 LTS: linux-image-5.15.0-1029-gke 5.15.0-1029.34~20.04.1 linux-image-gke-5.15 5.15.0.1029.34~20.04.1 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-5987-1 CVE-2022-2196, CVE-2022-3424, CVE-2022-36280, CVE-2022-41218, CVE-2022-4382, CVE-2022-48423, CVE-2022-48424, CVE-2023-0045, CVE-2023-0210, CVE-2023-0266, CVE-2023-23454, CVE-2023-23455, CVE-2023-23559, CVE-2023-26606, CVE-2023-28328 Package Information: https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1030.35 https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1027.30 https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1030.35 https://launchpad.net/ubuntu/+source/linux-gke-5.15/5.15.0-1029.34~20.04.1