The new Linux kernel security update comes one and a half months after the previous update and it’s available for the Ubuntu 21.04 (Hirsute Hippo), Ubuntu 20.04 LTS (Focal Fossa), and Ubuntu 18.04 LTS (Bionic Beaver) operating systems series.
Patched in these kernel updates are several security vulnerabilities affecting the KVM hypervisor for AMD processors on all Ubuntu releases. These include CVE-2021-3656 and CVE-2021-3653, both flaws allowing an attacker in a guest virtual machine to read or write to portions of the host’s physical memory, as well as CVE-2021-22543, a use-after-free vulnerability that could allow an attacker who could start and control a virtual machine to expose sensitive information or execute arbitrary code. These issues were discovered and reported by Maxim Levitsky and Paolo Bonzini. Learn more here.
LinuxToday is a trusted, contributor-driven news resource supporting all types of Linux users. Our thriving international community engages with us through social media and frequent content contributions aimed at solving problems ranging from personal computing to enterprise-level IT operations. LinuxToday serves as a home for a community that struggles to find comparable information elsewhere on the web.
Property of TechnologyAdvice. © 2025 TechnologyAdvice. All Rights Reserved
Advertiser Disclosure: Some of the products that appear on this site are from companies from which TechnologyAdvice receives compensation. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. TechnologyAdvice does not include all companies or all types of products available in the marketplace.