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This is a maintenance release. The following items were fixed and/or added:
- VMM: Added nested paging support for nested virtualization (Intel hosts only)
- VMM: Fixed rare guru meditations with certain guests on macOS 10.15 (Catalina) (bug #21237)
- VMM: Fixed possible VM process crash on Windows hosts when Hyper-V is used with certain guests (bug #21174)
- VMM: Fixed Windows XP guest hang or BSOD on AMD CPUs under certain circumstances (bug #21256)
- GUI: Various bugfixes for the Guest Control file manager
- GUI: Added more informative file operations in the Guest Control file manager
- GUI: Added an option to the global settings (the display page) to resize user interface font
- GUI: Fixed a regression in new vm wizard. Selected virtual disks are no longer deleted when the wizard is cancelled (bug #21244)
- GUI: Added a new menu item to the devices menu to optionally upgrade the guest additions.
- VirtioSCSI: Fixed recognition of the virtio SCSI controller by the EFI firmware (bug #21200)
- VirtioSCSI: Fixed hang when shutting down the VM if the virtio SCSI controller is used (bug #21144)
- virtio-net: Workaround a bug in the virtio-net driver included in FreeBSD version up to 12.3 which renders the device non functional (bug #21201)
- Storage: Fixed I/O errors with the VirtioSCSI controller when the host I/O cache is enabled (bug #19717)
- VBoxManage: Fixed regression when 'createmedium disk --variant RawDisk' command resulted in invalid .vmdk file (bug #21125)
- Main: Restored input pointing device behavior in multi-monitor VM configuration (bug #21137)
- Main: Fixed progress indication during automatic Linux Guest Additions installation
- Guest Control: Fixed path handling issues (bug #21095)
- 3D: Fixed VM process crash on macOS with 3D enabled (bug #21232)
- Linux Host and Guest: General improvements in startup scripts
- Linux Guest Additions: Introduced initial support for RHEL 8.7 and 9.2 kernels (bug #21272, #21258)
- Linux Guest Additions: Introduced initial support for SLES 15.4 kernels
- Linux Guest Additions: Fixed kernel modules rebuild behavior on system shutdown
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