Canonical today published new Linux kernel security updates for all supported Ubuntu releases to address several vulnerabilities, including the infamous “Dirty Pipe” vulnerability.
This is a small security update coming just two weeks after the previous security update and it patches the so-called “Dirty Pipe” security vulnerability (CVE-2022-0847) discovered by Max Kellermann. This vulnerability only affects Ubuntu 21.10 and Ubuntu 20.04 LTS systems running the Linux 5.13 kernel and could allow a local attacker to modify any file that could be opened for reading.
For all supported Ubuntu releases, including Ubuntu 21.10, Ubuntu 20.04 LTS, and Ubuntu 18.04 LTS, the new security update patches three Spectre-related flaws, CVE-2022-0001, CVE-2022-0002, and CVE-2022-23960. These were discovered by Enrico Barberis, Pietro Frigo, Marius Muench, Herbert Bos, and Cristiano Giuffrida, and could allow a local attacker to expose sensitive information due to insufficient hardware mitigations added by ARM and Intel to their processors to address the Spectre-BTI vulnerabilities.
Also for all supported Ubuntu releases, the new kernel security update also patches CVE-2022-25636, a security issue discovered by Nick Gregory that could allow a local attacker to cause a denial of service or possibly execute arbitrary code.
Canonical urges all Ubuntu users to update their installations to the new Linux kernel versions available in the stable repositories (linux-image 126.96.36.199.44 for Ubuntu 21.10 and Ubuntu 20.04.4 LTS, linux-image 188.8.131.52.108 for Ubuntu 20.04 LTS, as well as linux-image-hwe 184.108.40.206.118~18.04.89 for Ubuntu 18.04.6 LTS).
To update your installations, use the Software Updater utility to install all available updates or run the
sudo apt update && sudo apt full-upgrade command in the Terminal app. Please keep in mind to reboot your installations, as well as to rebuild and reinstall any third-party kernel modules you might have installed after applying the new kernel security patches.
Last updated 1 year ago