--- title: 'USN-5294-1: Linux kernel 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-5294-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-5294-1 --- # USN-5294-1: Linux kernel vulnerabilities Publication date 18 February 2022 Overview Several security issues were fixed in the Linux kernel. Releases [20.04 LTS](https://ubuntu.com/security/notices?release=focal) --- Open side navigation ## Packages * [linux](https://ubuntu.com/security/cves?package=linux) - Linux kernel ## Details It was discovered that the Packet network protocol implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ([CVE-2021-22600](https://ubuntu.com/security/CVE-2021-22600)) Szymon Heidrich discovered that the USB Gadget subsystem in the Linux kernel did not properly restrict the size of control requests for certain gadget types, leading to possible out of bounds reads or writes. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ([CVE-2021-39685](https://ubuntu.com/security/CVE-2021-39685)) Jann Horn discovered a race condition in the Unix domain socket implementation in the Linux kernel that could result in a read-after-free. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( --- 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 | | --- | --- | | 20.04 LTS focal | [linux-image-virtual](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.4.0.100.104](https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.100.104) | | | | [linux-image-generic](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.4.0.100.104](https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.100.104) | | | | [linux-image-oem](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.4.0.100.104](https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.100.104) | | | | [linux-image-5.4.0-100-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed) –  [5.4.0-100.113](https://launchpad.net/ubuntu/+source/linux-signed/5.4.0-100.113) | | | | [linux-image-oem-osp1](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.4.0.100.104](https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.100.104) | | | | [linux-image-5.4.0-100-generic-lpae](https://launchpad.net/ubuntu/+source/linux) –  [5.4.0-100.113](https://launchpad.net/ubuntu/+source/linux/5.4.0-100.113) | | | | [linux-image-5.4.0-100-generic](https://launchpad.net/ubuntu/+source/linux-signed) –  [5.4.0-100.113](https://launchpad.net/ubuntu/+source/linux-signed/5.4.0-100.113) | | | | [linux-image-generic-lpae](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.4.0.100.104](https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.100.104) | | | | [linux-image-lowlatency](https://launchpad.net/ubuntu/+source/linux-meta) –  [5.4.0.100.104](https://launchpad.net/ubuntu/+source/linux-meta/5.4.0.100.104) | | | --- ### 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-2022-22942](https://ubuntu.com/security/CVE-2022-22942) * [CVE-2022-0330](https://ubuntu.com/security/CVE-2022-0330) * [CVE-2021-43975](https://ubuntu.com/security/CVE-2021-43975) * [CVE-2021-4202](https://ubuntu.com/security/CVE-2021-4202) * [CVE-2021-4155](https://ubuntu.com/security/CVE-2021-4155) * [CVE-2021-4083](https://ubuntu.com/security/CVE-2021-4083) * [CVE-2021-39685](https://ubuntu.com/security/CVE-2021-39685) * [CVE-2021-22600](https://ubuntu.com/security/CVE-2021-22600) ## Related notices * [USN-5926-1](https://ubuntu.com/security/notices/USN-5926-1) * [USN-5884-1](https://ubuntu.com/security/notices/USN-5884-1) * [USN-5513-1](https://ubuntu.com/security/notices/USN-5513-1) * [USN-5505-1](https://ubuntu.com/security/notices/USN-5505-1) * [USN-5500-1](https://ubuntu.com/security/notices/USN-5500-1) * [USN-5385-1](https://ubuntu.com/security/notices/USN-5385-1) * [USN-5368-1](https://ubuntu.com/security/notices/USN-5368-1) * [USN-5362-1](https://ubuntu.com/security/notices/USN-5362-1) * [USN-5361-1](https://ubuntu.com/security/notices/USN-5361-1) * [USN-5337-1](https://ubuntu.com/security/notices/USN-5337-1) --- Show 8 more references --- Have additional questions? 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