--- title: 'USN-5669-2: 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-5669-2 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-5669-2 --- # USN-5669-2: Linux kernel vulnerabilities Publication date 10 October 2022 Overview Several security issues were fixed in the Linux kernel. Releases [16.04 LTS](https://ubuntu.com/security/notices?release=xenial) --- Open side navigation ## Packages * [linux-hwe](https://ubuntu.com/security/cves?package=linux-hwe) - Linux hardware enablement (HWE) kernel * [linux-oracle](https://ubuntu.com/security/cves?package=linux-oracle) - Linux kernel for Oracle Cloud systems ## Details It was discovered that the SUNRPC RDMA protocol implementation in the Linux kernel did not properly calculate the header size of a RPC message payload. A local attacker could use this to expose sensitive information (kernel memory). ([CVE-2022-0812](https://ubuntu.com/security/CVE-2022-0812)) Moshe Kol, Amit Klein and Yossi Gilad discovered that the IP implementation in the Linux kernel did not provide sufficient randomization when calculating port offsets. An attacker could possibly use this to expose sensitive information. ([CVE-2022-1012](https://ubuntu.com/security/CVE-2022-1012), [CVE-2022-32296](https://ubuntu.com/security/CVE-2022-32296)) Duoming Zhou discovered that race conditions existed in the timer handling implementation of the Linux kernel's Rose X.25 protocol layer, resulting in use-after-free vulnerabilities. A local attacker could use this to cause a denial of service (system crash). ( --- 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 | | --- | --- | | 16.04 LTS xenial | [linux-image-4.15.0-194-generic](https://launchpad.net/ubuntu/+source/linux-signed-hwe) –  4.15.0-194.205~16.04.1   Ubuntu Pro | | | | [linux-image-oracle](https://launchpad.net/ubuntu/+source/linux-meta-oracle) –  4.15.0.1107.91   Ubuntu Pro | | | | [linux-image-virtual-hwe-16.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  4.15.0.194.181   Ubuntu Pro | | | | [linux-image-4.15.0-194-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed-hwe) –  4.15.0-194.205~16.04.1   Ubuntu Pro | | | | [linux-image-oem](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  4.15.0.194.181   Ubuntu Pro | | | | [linux-image-4.15.0-1107-oracle](https://launchpad.net/ubuntu/+source/linux-signed-oracle) –  4.15.0-1107.118~16.04.1   Ubuntu Pro | | | | [linux-image-lowlatency-hwe-16.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  4.15.0.194.181   Ubuntu Pro | | | | [linux-image-generic-hwe-16.04](https://launchpad.net/ubuntu/+source/linux-meta-hwe) –  4.15.0.194.181   Ubuntu Pro | | | --- ### 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-2022-33744](https://ubuntu.com/security/CVE-2022-33744) * [CVE-2022-33742](https://ubuntu.com/security/CVE-2022-33742) * [CVE-2022-33741](https://ubuntu.com/security/CVE-2022-33741) * [CVE-2022-33740](https://ubuntu.com/security/CVE-2022-33740) * [CVE-2022-32296](https://ubuntu.com/security/CVE-2022-32296) * [CVE-2022-26365](https://ubuntu.com/security/CVE-2022-26365) * [CVE-2022-2318](https://ubuntu.com/security/CVE-2022-2318) * [CVE-2022-1012](https://ubuntu.com/security/CVE-2022-1012) * [CVE-2022-0812](https://ubuntu.com/security/CVE-2022-0812) ## Related notices id="usn" *Search* * [USN-6014-1](https://ubuntu.com/security/notices/USN-6014-1) * [USN-6013-1](https://ubuntu.com/security/notices/USN-6013-1) * [USN-6001-1](https://ubuntu.com/security/notices/USN-6001-1) * [USN-5789-1](https://ubuntu.com/security/notices/USN-5789-1) * [USN-5773-1](https://ubuntu.com/security/notices/USN-5773-1) * [USN-5706-1](https://ubuntu.com/security/notices/USN-5706-1) * [USN-5695-1](https://ubuntu.com/security/notices/USN-5695-1) * [USN-5693-1](https://ubuntu.com/security/notices/USN-5693-1) * [USN-5687-1](https://ubuntu.com/security/notices/USN-5687-1) * [USN-5684-1](https://ubuntu.com/security/notices/USN-5684-1) --- Show 29 more references --- Have additional questions? 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