Что нового:
VMM: fixed task switches triggered by INTn instruction (bug #17979)
Storage: fixed connecting to certain iSCSI targets (bug #17507)
Storage: fixed handling of flush requests when configured to be ignored when the host I/O cache is used (bug #17573)
Drag and drop: implemented support for UNC paths (bug #17146)
Drag and drop: fixed resuming operation when restoring from a saved state (bug #17649)
Drag and drop: fixed copying files with long file names (> 248 characters) from guests to Windows hosts (bug #17447)
Drag and drop: fixed handling files with Unicode names on Windows guests (bug #15501)
Drag and drop: fixed copying empty (0-byte) files to / from guests (bugs #14863 + #17443)
Drag and drop: fixed copying over files from hosts to Linux guests (bug #16025)
Networking: restore connectivity for guests bridged to host adapters that were unavailable temporarily (Windows hosts, bug #17090)
Guest Control: fixed hang when using --wait-stdout and/or --wait-stderr (bug #17386). Needs updating Guest Additions
Video recording: fixed starting video recording on VM power up (bug #17307)
Linux Additions: various build fixes for kernel modules on recent distributions, and made sure modules end up in initramfs files
Linux Additions: build fixes for 4.19, thank you Larry Finger
Linux Additions: various small fixes for video driver
https://www.virtualbox.org/wiki/Changelog