Guest Control/VBoxManage: Fixed behavior of how handling argument 0 for a started guest process works: One can now explicitly specify it with the newly added option "--arg0". This will effectively restore the behavior of former VirtualBox versions
Audio: Also use the PulseAudio backend when pipewire-pulse is running instead of falling back to ALSA (bug #21575)
NAT: Adjusted UDP proxy timeout from 18-21 to 21-24 range to respect intended 20 second timeout (bug #21560)
Linux Host: Added initial support for Indirect Branch Tracking (NOTE: All distributions .run installer and Extension Pack in VirtualBox 6.1.x series do not support this feature, please consider upgrading to 7.0.x) (bug #21435)
Linux Host: Added initial support for kernel 6.5 (NOTE: Guest Additions do not support kernel 6.5 yet)
Solaris Host: Introduced general improvements in the installer area
Linux Host and Guest: Improved condition check when kernel modules need to be signed
Linux Host and Guest: Added initial support for RHEL 8.8 (bug #21692), 8.9 (bug #21690) and 9.3 (bug #21598) kernels
MacOS Host and Guest: Introduced general improvements in the installer area
Windows Host and Guest: Introduced ECDSA support (bug #21621)
Linux Guest Additions: Fixed issue when kernel modules were rebuilt on each boot when guest system has no X11 installed
Linux Guest Additions: Added initial support for kernel 6.4
Windows Guest Additions: Introduced general improvements in graphics drivers area
Oracle VirtualBox 6.1.46 [Maintenance Release] 
