--- title: 'USN-5793-2: 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-5793-2 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-5793-2 --- # USN-5793-2: Linux kernel (Azure) vulnerabilities Publication date 9 January 2023 Overview Several security issues were fixed in the Linux kernel. Releases [22.10](https://ubuntu.com/security/notices?release=kinetic) --- Open side navigation ## Packages * [linux-azure](https://ubuntu.com/security/cves?package=linux-azure) - Linux kernel for Microsoft Azure Cloud systems ## Details It was discovered that the io\_uring subsystem 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-2022-3910](https://ubuntu.com/security/CVE-2022-3910)) It was discovered that a race condition existed in the Android Binder IPC 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 execute arbitrary code. ([CVE-2022-20421](https://ubuntu.com/security/CVE-2022-20421)) David Leadbeater discovered that the netfilter IRC protocol tracking implementation in the Linux Kernel incorrectly handled certain message payloads in some situations. A remote attacker could possibly use this to cause a denial of service or bypass firewall filtering. ( --- 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 | | --- | --- | | 22.10 kinetic | [linux-image-5.19.0-1016-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure) –  [5.19.0-1016.17](https://launchpad.net/ubuntu/+source/linux-signed-azure/5.19.0-1016.17) | | | | [linux-image-azure](https://launchpad.net/ubuntu/+source/linux-meta-azure) –  [5.19.0.1016.12](https://launchpad.net/ubuntu/+source/linux-meta-azure/5.19.0.1016.12) | | | --- ### 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-2022-43750](https://ubuntu.com/security/CVE-2022-43750) * [CVE-2022-41850](https://ubuntu.com/security/CVE-2022-41850) * [CVE-2022-41849](https://ubuntu.com/security/CVE-2022-41849) * [CVE-2022-4095](https://ubuntu.com/security/CVE-2022-4095) * [CVE-2022-40307](https://ubuntu.com/security/CVE-2022-40307) * [CVE-2022-3977](https://ubuntu.com/security/CVE-2022-3977) * [CVE-2022-3910](https://ubuntu.com/security/CVE-2022-3910) * [CVE-2022-3649](https://ubuntu.com/security/CVE-2022-3649) * [CVE-2022-3646](https://ubuntu.com/security/CVE-2022-3646) * [CVE-2022-3623](https://ubuntu.com/security/CVE-2022-3623) --- Show 7 more references ## Related notices id="usn" *Search* * [USN-6252-1](https://ubuntu.com/security/notices/USN-6252-1) * [USN-6247-1](https://ubuntu.com/security/notices/USN-6247-1) * [USN-6124-1](https://ubuntu.com/security/notices/USN-6124-1) * [USN-6071-1](https://ubuntu.com/security/notices/USN-6071-1) * [USN-6045-1](https://ubuntu.com/security/notices/USN-6045-1) * [USN-6031-1](https://ubuntu.com/security/notices/USN-6031-1) * [USN-6014-1](https://ubuntu.com/security/notices/USN-6014-1) * [USN-6013-1](https://ubuntu.com/security/notices/USN-6013-1) * [USN-6007-1](https://ubuntu.com/security/notices/USN-6007-1) * [USN-6001-1](https://ubuntu.com/security/notices/USN-6001-1) --- Show 36 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)