Skip to main content
  1. Blog
  2. Article

Canonical
on 30 July 2019

Canonical Design Blog: Amazon EC2 On-Demand Hibernation for Ubuntu 18.04 LTS now available

AWS and Canonical today announce the public release of Amazon EC2 Hibernation support for Ubuntu 18.04 LTS, as part of the efforts to continuously optimise Ubuntu on AWS. Amazon EC2 Hibernation gives you the ability to launch Amazon EC2 instances, set them up as desired, hibernate them, and then quickly bring them back to life when you need them. Applications pick up exactly where they left off instead of rebuilding their memory footprint. Using hibernate, you can maintain a fleet of pre-warmed instances that can get to a productive state faster, and you can do this without modifying your existing applications. The necessary software updates are available in Ubuntu 18.04 LTS AWS Machine Images (AMIs) with a serial of 20190722.1 or later. Support for other Ubuntu releases is in progress. Once you've learned about Amazon EC2 hibernation, you can enable hibernation for your Amazon EC2 instances using the Amazon EC2 Hibernation user guide. Limitations: There is a known issue when using Amazon EC2 Hibernation related to KASLR (Kernel Address Space Layout Randomisation). KASLR is a standard Linux kernel security feature which helps to mitigate exposure to and ramifications of yet-undiscovered memory access vulnerabilities by randomising the base address value of the kernel. In a small percentage of tests, instances with KASLR enabled do not resume and become completely unusable after hibernation. Disabling KASLR, which is enabled by default, is known to avoid this issue. Please see bug lp:1837469 for additional details.

Related posts

Luci Stanescu
14 May 2026

Fragnesia Linux kernel local privilege escalation vulnerability mitigations

Ubuntu Article

A local privilege escalation (LPE) vulnerability affecting the Linux kernel has been publicly disclosed on May 13, 2026. The vulnerability does not have a CVE ID published, but is referred to as “Fragnesia.”  The vulnerability affects multiple Linux distributions, including all Ubuntu releases. The affected components are the Linux kernel ...

Bertrand Boisseau
13 May 2026

Rethinking BYOD security: protecting data without trusting devices

Ubuntu Article

BYOD (bring your own device) has always looked better on paper than it does in real life. The promise is clear: let people use the gadgets they already own. Less friction, lower costs, and more freedom. But when security and privacy are non-negotiable, the conversation around BYOD usually ends quickly. Not because BYOD is a ...

Luci Stanescu
8 May 2026

Dirty Frag Linux kernel local privilege escalation vulnerability mitigations

Ubuntu Article

Two local privilege escalation (LPE) vulnerabilities affecting the Linux kernel have been publicly disclosed on May 7, 2026. The vulnerabilities have been assigned the IDs CVE-2026-43284 and CVE-2026-43500 and are referred to as “Dirty Frag.” The affected components are Linux kernel modules. The first vulnerability impacts the modules tha ...