--- title: 'USN-5927-1: Linux kernel (Azure) vulnerabilities | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-5927-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-5927-1 --- # USN-5927-1: Linux kernel (Azure) vulnerabilities Publication date 7 March 2023 Overview Several security issues were fixed in the Linux kernel. Releases [18.04 LTS](https://ubuntu.com/security/notices?release=bionic) --- Open side navigation ## Packages * [linux-azure-4.15](https://ubuntu.com/security/cves?package=linux-azure-4.15) - Linux kernel for Microsoft Azure Cloud systems ## Details It was discovered that the Upper Level Protocol (ULP) subsystem in the Linux kernel did not properly handle sockets entering the LISTEN state in certain protocols, 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-2023-0461](https://ubuntu.com/security/CVE-2023-0461)) It was discovered that the System V IPC implementation in the Linux kernel did not properly handle large shared memory counts. A local attacker could use this to cause a denial of service (memory exhaustion). ([CVE-2021-3669](https://ubuntu.com/security/CVE-2021-3669)) 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](https://ubuntu.com/security/CVE-2022-3424)) It was discovered... --- Show more ## Update instructions After a standard system update you need to reboot your computer to make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) 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. The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 18.04 LTS bionic | [linux-image-4.15.0-1162-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure-4.15) –  [4.15.0-1162.177](https://launchpad.net/ubuntu/+source/linux-signed-azure-4.15/4.15.0-1162.177) | | | | [linux-image-azure-lts-18.04](https://launchpad.net/ubuntu/+source/linux-meta-azure-4.15) –  [4.15.0.1162.130](https://launchpad.net/ubuntu/+source/linux-meta-azure-4.15/4.15.0.1162.130) | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2023-23559](https://ubuntu.com/security/CVE-2023-23559) * [CVE-2023-23455](https://ubuntu.com/security/CVE-2023-23455) * [CVE-2023-0461](https://ubuntu.com/security/CVE-2023-0461) * [CVE-2023-0394](https://ubuntu.com/security/CVE-2023-0394) * [CVE-2023-0266](https://ubuntu.com/security/CVE-2023-0266) * [CVE-2023-0045](https://ubuntu.com/security/CVE-2023-0045) * [CVE-2022-47929](https://ubuntu.com/security/CVE-2022-47929) * [CVE-2022-42895](https://ubuntu.com/security/CVE-2022-42895) * [CVE-2022-42329](https://ubuntu.com/security/CVE-2022-42329) * [CVE-2022-42328](https://ubuntu.com/security/CVE-2022-42328) --- Show 8 more references ## Related notices id="usn" *Search* * [USN-7607-1](https://ubuntu.com/security/notices/USN-7607-1) * [USN-7607-2](https://ubuntu.com/security/notices/USN-7607-2) * [USN-7607-3](https://ubuntu.com/security/notices/USN-7607-3) * [USN-6248-1](https://ubuntu.com/security/notices/USN-6248-1) * [USN-6247-1](https://ubuntu.com/security/notices/USN-6247-1) * [USN-6151-1](https://ubuntu.com/security/notices/USN-6151-1) * [USN-6134-1](https://ubuntu.com/security/notices/USN-6134-1) * [USN-6096-1](https://ubuntu.com/security/notices/USN-6096-1) * [USN-6091-1](https://ubuntu.com/security/notices/USN-6091-1) * [USN-6079-1](https://ubuntu.com/security/notices/USN-6079-1) --- Show 69 more references --- Have additional questions? [Talk to a member of the team ›](https://wiki.ubuntu.com/SecurityTeam/FAQ?_ga=2.242131138.1744859116.1742138161-1500419473.1726851136&_gl=1*161muja*_gcl_au*MzUyMTIzNjI1LjE3MzYyNDQ4NTE.#Contact)