Stay Secure with the Latest Linux Advisories

security advisorydenial servicekernel fix

Ubuntu 22.04 LTS USN-6044-1 Moderate: Kernel Elevation Privileges

Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-6044-1 April 26, 2023 linux, linux-aws, linux-aws-5.15, linux-azure, linux-gke, linux-gke-5.15, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, 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: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud 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-lowlatency: Linux low latency kernel - linux-oracle: Linux kernel for Oracle Cloud systems - linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems - linux-gke-5.15: Linux kernel for Google Container Engine (GKE) systems - linux-hwe-5.15: Linux hardware enablement (HWE) kernel - linux-lowlatency-hwe-5.15: Linux low latency kernel - linux-oracle-5.15: Linux kernel for Oracle Cloud systems Details: It was discovered that the Traffic-Control Index (TCINDEX) implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for this CVE, kernel support for the TCINDEX classifier has been removed. (CVE-2023-1829) It was discovered that a race condition existed in the io_uring subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly executearbitrary code. (CVE-2023-1872) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1019-gkeop 5.15.0-1019.24 linux-image-5.15.0-1029-ibm 5.15.0-1029.32 linux-image-5.15.0-1032-gke 5.15.0-1032.37 linux-image-5.15.0-1034-oracle 5.15.0-1034.40 linux-image-5.15.0-1035-aws 5.15.0-1035.39 linux-image-5.15.0-1037-azure 5.15.0-1037.44 linux-image-5.15.0-71-generic 5.15.0-71.78 linux-image-5.15.0-71-generic-64k 5.15.0-71.78 linux-image-5.15.0-71-generic-lpae 5.15.0-71.78 linux-image-5.15.0-71-lowlatency 5.15.0-71.78 linux-image-5.15.0-71-lowlatency-64k 5.15.0-71.78 linux-image-aws-lts-22.04 5.15.0.1035.34 linux-image-azure 5.15.0.1037.33 linux-image-azure-lts-22.04 5.15.0.1037.33 linux-image-generic 5.15.0.71.69 linux-image-generic-64k 5.15.0.71.69 linux-image-generic-lpae 5.15.0.71.69 linux-image-gke 5.15.0.1032.31 linux-image-gke-5.15 5.15.0.1032.31 linux-image-gkeop 5.15.0.1019.18 linux-image-gkeop-5.15 5.15.0.1019.18 linux-image-ibm 5.15.0.1029.25 linux-image-lowlatency 5.15.0.71.76 linux-image-lowlatency-64k 5.15.0.71.76 linux-image-oracle 5.15.0.1034.29 linux-image-virtual 5.15.0.71.69 Ubuntu 20.04 LTS: linux-image-5.15.0-1032-gke 5.15.0-1032.37~20.04.1 linux-image-5.15.0-1034-oracle 5.15.0-1034.40~20.04.1 linux-image-5.15.0-1035-aws 5.15.0-1035.39~20.04.1 linux-image-5.15.0-71-generic 5.15.0-71.78~20.04.1 linux-image-5.15.0-71-generic-64k 5.15.0-71.78~20.04.1 linux-image-5.15.0-71-generic-lpae 5.15.0-71.78~20.04.1 linux-image-5.15.0-71-lowlatency 5.15.0-71.78~20.04.1 linux-image-5.15.0-71-lowlatency-64k 5.15.0-71.78~20.04.1 linux-image-aws 5.15.0.1035.39~20.04.24 linux-image-generic-64k-hwe-20.04 5.15.0.71.78~20.04.32 linux-image-generic-hwe-20.04 5.15.0.71.78~20.04.32 linux-image-generic-lpae-hwe-20.04 5.15.0.71.78~20.04.32 linux-image-gke-5.15 5.15.0.1032.37~20.04.1 linux-image-lowlatency-64k-hwe-20.04 5.15.0.71.78~20.04.29 linux-image-lowlatency-hwe-20.04 5.15.0.71.78~20.04.29 linux-image-oem-20.04 5.15.0.71.78~20.04.32 linux-image-oem-20.04b 5.15.0.71.78~20.04.32 linux-image-oem-20.04c 5.15.0.71.78~20.04.32 linux-image-oem-20.04d 5.15.0.71.78~20.04.32 linux-image-oracle 5.15.0.1034.40~20.04.1 linux-image-virtual-hwe-20.04 5.15.0.71.78~20.04.32 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-6044-1 CVE-2023-1829, CVE-2023-1872 Package Information: https://launchpad.net/ubuntu/+source/linux/5.15.0-71.78 https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1035.39 https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1037.44 https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1032.37 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1019.24 https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1029.32 https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-71.78 https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1034.40 https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1035.39~20.04.1 https://launchpad.net/ubuntu/+source/linux-gke-5.15/5.15.0-1032.37~20.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-71.78~20.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-71.78~20.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1034.40~20.04.1 . Addressed various vulnerabilities in the Linux kernel for Ubuntu 20.04 and 22.04 LTS, including specific information about the required updates.. Ubuntu Kernel Upgrade, Linux Kernel Issues, Security Updates. . LinuxSecurity.com Team

Apr 26, 2023 Ubuntu