# xen 4.20

Published articles for xen 4.20.

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## Xen Project 4.20: A Step Forward in Open Source Virtualization

DevFeed: [Xen Project 4.20: A Step Forward in Open Source Virtualization](<https://devfeed.tech/articles/xen-project-4-20-a-step-forward-in-open-source-virtualization-12838.md>)

Original publisher: [Read original article](<https://xenproject.org/blog/xen-project-4-20-oss-virtualization/>)

Author: Cody Zuschlag

Published: 2025-03-11T13:30:38Z

Content type: article

Language: en

Sources: [Blog - Xen Project](<https://devfeed.tech/sources/blog-xen-project.md>)

Topics: [virtualization](<https://devfeed.tech/topics/virtualization.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Security](<https://devfeed.tech/topics/security.md>), [Fuzzing/Fuzz testing](<https://devfeed.tech/topics/fuzzing.md>), [Optimization](<https://devfeed.tech/topics/optimization.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>)

Tags: [2025](<https://devfeed.tech/tags/2025.md>), [amd](<https://devfeed.tech/tags/amd.md>), [announcements](<https://devfeed.tech/tags/announcements.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [fuzzing](<https://devfeed.tech/tags/fuzzing.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [intel](<https://devfeed.tech/tags/intel.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [optimization](<https://devfeed.tech/tags/optimization.md>), [performance](<https://devfeed.tech/tags/performance.md>), [release](<https://devfeed.tech/tags/release.md>), [releases](<https://devfeed.tech/tags/releases.md>), [security](<https://devfeed.tech/tags/security.md>), [testing](<https://devfeed.tech/tags/testing.md>), [virtualization](<https://devfeed.tech/tags/virtualization.md>), [xen-4-20](<https://devfeed.tech/tags/xen-4-20.md>)

### AI overview

The article discusses the Xen Project's Xen 4.20 release as an open-source virtualization update. It highlights security improvements, including expanded MISRA C compliance, fuzzing, and UBSAN enabled by default, along with performance optimizations for page-table management, cache utilization, device passthrough, Intel CPUs, and AMD Zen 5. The release is presented as targeting cloud, enterprise, and embedded-system workloads.

### Source excerpt

Xen 4.20 is here! 🚀 This release boosts security, performance, and architecture support, shaping the future of open-source virtualization.