The remote SUSE host is missing one or more security updates.
This update for libvirt fixes the following issues : This new feature was added : bsc#1094325, bsc#1094725: libxl: Enable virsh blockresize for XEN guests This security issue was fixed: CVE-2017-5715: Additional fixes for the Spectre patches (bsc#1079869) The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE Linux Enterprise Server 12-SP2-BCL:zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2018-1843=1