This update for xen fixes several security issues:
{
    "binaries": [
        {
            "xen-libs": "4.2.5_21-41.1",
            "xen": "4.2.5_21-41.1",
            "xen-kmp-default": "4.2.5_21_3.0.101_0.47.99-41.1",
            "xen-doc-pdf": "4.2.5_21-41.1",
            "xen-doc-html": "4.2.5_21-41.1",
            "xen-tools": "4.2.5_21-41.1",
            "xen-kmp-pae": "4.2.5_21_3.0.101_0.47.99-41.1",
            "xen-tools-domU": "4.2.5_21-41.1",
            "xen-libs-32bit": "4.2.5_21-41.1"
        }
    ]
}{
    "binaries": [
        {
            "xen-libs": "4.2.5_21-41.1",
            "xen": "4.2.5_21-41.1",
            "xen-kmp-default": "4.2.5_21_3.0.101_0.47.99-41.1",
            "xen-doc-html": "4.2.5_21-41.1",
            "xen-doc-pdf": "4.2.5_21-41.1",
            "xen-tools": "4.2.5_21-41.1",
            "xen-tools-domU": "4.2.5_21-41.1",
            "xen-libs-32bit": "4.2.5_21-41.1"
        }
    ]
}{
    "binaries": [
        {
            "xen-libs": "4.2.5_21-41.1",
            "xen": "4.2.5_21-41.1",
            "xen-kmp-default": "4.2.5_21_3.0.101_0.47.99-41.1",
            "xen-doc-html": "4.2.5_21-41.1",
            "xen-doc-pdf": "4.2.5_21-41.1",
            "xen-tools": "4.2.5_21-41.1",
            "xen-tools-domU": "4.2.5_21-41.1",
            "xen-libs-32bit": "4.2.5_21-41.1"
        }
    ]
}{
    "binaries": [
        {
            "xen-libs": "4.2.5_21-41.1",
            "xen": "4.2.5_21-41.1",
            "xen-kmp-default": "4.2.5_21_3.0.101_0.47.99-41.1",
            "xen-doc-html": "4.2.5_21-41.1",
            "xen-doc-pdf": "4.2.5_21-41.1",
            "xen-tools": "4.2.5_21-41.1",
            "xen-tools-domU": "4.2.5_21-41.1",
            "xen-libs-32bit": "4.2.5_21-41.1"
        }
    ]
}