content: blog: Release v46.0

content/en/blog/v46.0/index.md

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+---
+title: "Cloud Hypervisor v46.0 Released!"
+date: 2025-05-23T22:07:00Z
+draft: false
+contributors: [Cloud Hypervisor Team]
+---
+This release has been tracked in [v46.0 group](https://github.com/orgs/cloud-hypervisor/projects/6/views/4?filterQuery=release%3A%22Release+46%22) of our [roadmap project](https://github.com/orgs/cloud-hypervisor/projects/6/).
+
+File-level Locking Support with `--disk`
+----------------------------------------
+
+Now file-level locking is enforced for disk images, provided by users
+with `--disk`. This ensures that only a single Cloud Hypervisor instance
+can obtain write access to a given disk image at any time, preventing
+misconfiguration and avoiding potential data corruption. (#6974)
+
+Improved Error Reporting with VM Resizing
+-----------------------------------------
+
+Instead of returning a generic error `400` (e.g. `BadRequest`), users
+now get a more specific error `429` (e.g. `TooManyRequests`) when a
+pending VM resizing is not completed. This allows users to better handle
+different errors, say retrying the request when applicable. (#7043)
+
+IPv6 Address Support with `--net`
+---------------------------------
+
+It is now possible to specify an IPv6 address and mask when creating a
+network interface with `--net`. (#7048)
+
+Experimental AArch64 Support with the MSHV Hypervisor
+-----------------------------------------------------
+
+It is now possible to start VMs on AArch64 platforms when using MSHV
+hypervisor. (#7055)
+
+Deprecated SGX Support
+----------------------
+
+The SGX support now is deprecated with a warning message if it being
+used, with the intention to remove its support from our code base in two
+release cycles (e.g. v48.0). (#7090)
+
+Notable Bug Fixes
+-----------------
+
+* Remove `path` as required for `DiskConfig` from the OpenAPI spec file
+  (#7017)
+* Properly parse PCI capabilities (#7018)
+* Reprogram PCI device BAR when its MSE bit is set (#7063)
+* Update IOMMU mappings of MMIO regions with BAR reprogram for VFIO
+  devices (#7064)
+* Avoid resizing VMs to zero vCPUs (#7086)
+* Fix extended topology enumeration leaf exposed to the guest (#7087)
+
+Contributors
+------------
+
+Many thanks to everyone who has contributed to our release:
+
+* Bingxin Li <[email protected]>
+* Bo Chen <[email protected]>
+* Fabiano Fidêncio <[email protected]>
+* Gregory Anders <[email protected]>
+* Jinank Jain <[email protected]>
+* Julian Stecklina <[email protected]>
+* Muminul Islam <[email protected]>
+* Paolo Bonzini <[email protected]>
+* Philipp Schuster <[email protected]>
+* Rob Bradford <[email protected]>
+* Ruoqing He <[email protected]>
+* Thomas Prescher <[email protected]>
+* abm-77 <[email protected]>
+### Download
+ See the <a href="https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v46.0">GitHub Release</a> for the release assets.