CVE-2015-7813

CVE-2015-7813 describes a denial-of-service vulnerability in Xen versions 4.4.x, 4.5.x, and 4.6.x. This flaw allows a local guest to trigger an excessive number of console messages by repeatedly invoking unimplemented hypercalls, specifically HYPERVISOR_physdev_op or HYPERVISOR_hvm_op, leading to system instability. The vulnerability has a low severity CVSS score of 2.1 (AV:L/AC:L/Au:N/C:N/I:N/A:P), indicating a local attack vector with low complexity and a potential for partial denial of service. There is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage are minimal, with only one mention and one article identified.