A new VirtualBox build has solved the problem with kernel modules failing to build. This is what works on my Almalinux-9.8 machine: Name : VirtualBox-7.2 Version : 7.2.15_174675_el9 Release : 1 Architecture: x86_64 Install Date: Mon 03 Aug 2026 10:48:44 AM CDT Group : Applications/System Size : 282205458 License : GPLv3 Signature : (none) Source RPM : VirtualBox-7.2-7.2.15_174675_el9-1.src.rpm Build Date : Fri 31 Jul 2026 08:21:13 AM CDT Build Host : 1036ff880c6c Vendor : Oracle Corporation URL : http://www.virtualbox.org/ Summary : Oracle VirtualBox https://www.virtualbox.org/download/testcase/VirtualBox-7.2-7.2.15_174675_el... -- -John (JohnDThompson@gmail.com) Appleton, WI USA