Ubuntu 20.04 LTS Gets New Kernel Update, Three Security Vulnerabilities Patched

Three security vulnerabilities are patched in this new Linux kernel update for the latest Ubuntu 20.04 LTS (Focal Fossa) release, which was launched by Canonical on April 23rd, 2020. A first kernel security update was released just a week after its official launch. This new Linux kernel update fixes a flaw (CVE-2019-19377) discovered in the Btrfs file system implementation, which incorrectly detected blocks marked as dirty in certain situations, allowing an attacker to cause a denial of service (system crash) using a specially crafted file system image.