The latest supported version of Oracle Solaris for your server is Oracle Solaris 11.3 SRU 32.
For other operating systems, the following list provides links to Hardware Compatibility Lists (HCLs). To find the latest supported operating system versions, go to the corresponding HCL.
Oracle Linux -- http://linux.oracle.com/pls/apex/f?p=117:1:3991604960223967
Oracle VM -- http://linux.oracle.com/pls/apex/f?p=117:1:3991604960223967
Windows -- http://www.windowsservercatalog.com/
VMware ESXi -- http://www.vmware.com/resources/compatibility/search.php/
Red Hat Enterprise Linux -- https://access.redhat.com/certifications
SUSE Linux Enterprise Server -- https://www.suse.com/yessearch/Search.jsp
The following list shows the minimum supported operating systems.
Oracle Solaris 10 8/11, 10 9/10, 10 10/09 (64-bit)
Oracle Solaris 11, 11.1, and 11.2 (64-bit)
Oracle Linux 5.5, 5.6, 5.7, 5.9, 5.10, 6.1, 6.4, 6.5 6.6, 7.0, and 7.1 (64-bit)
Oracle VM 2.2.1, 2.2.2, 3.0, 3.2.1, 3.3.1, 3.3.2
Red Hat Enterprise Linux 5.5, 5.6, 5.7, 6.0, 6.1, 6.0, 7.1
SUSE Enterprise Linux (SLES) 11 and SLES11 SP1 (64-bit)
Windows 2008 and R2 SP1 (64-bit)
VMware ESX/ESXi 4.0 U2, ESX/ESXi 4.1 U1, ESXi 5.0