[USN-8226-2] kmod update

========================================================================== Ubuntu Security Notice USN-8226-2 April 30, 2026 kmod update ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: kmod has been updated to block loading of the algif_aead kernel module. Software Description: - kmod: tools for managing Linux kernel modules Details: USN-8226-1 added a mitigation to kmod to disable loading the algif_aead module. This update adds the same mitigation to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: It was discovered that the Linux kernel algif_aead module contained a logic flaw allowing a local attacker to escalate privileges to root. This update to the kmod package disables loading the algif_aead module as a measure to mitigate the issue until kernel updates are made available. See the following URL for more information https://ubuntu.com/blog/copy-fail-vulnerability-fixes-available Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS kmod 27-1ubuntu2.1+esm1 Available with Ubuntu Pro Ubuntu 18.04 LTS kmod 24-1ubuntu3.5+esm1 Available with Ubuntu Pro Ubuntu 16.04 LTS kmod 22-1ubuntu5.2+esm1 Available with Ubuntu Pro Ubuntu 14.04 LTS kmod 15-0ubuntu7+esm1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8226-2 https://ubuntu.com/security/notices/USN-8226-1 CVE-2026-31431