This update for xen fixes the following issues:
CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).
Update to Xen 4.14.3 bug fix release (bsc#1027519).
{
    "binaries": [
        {
            "xen-libs": "4.14.3_04-3.15.1",
            "xen": "4.14.3_04-3.15.1",
            "xen-tools-xendomains-wait-disk": "4.14.3_04-3.15.1",
            "xen-doc-html": "4.14.3_04-3.15.1",
            "xen-devel": "4.14.3_04-3.15.1",
            "xen-tools": "4.14.3_04-3.15.1",
            "xen-tools-domU": "4.14.3_04-3.15.1",
            "xen-libs-32bit": "4.14.3_04-3.15.1"
        }
    ]
}