The qemu implementation in libvirt before 1.3.0 and Xen allows local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr.
http://www.openwall.com/lists/oss-security/2016/05/24/5
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securitytracker.com/id/1035945
http://xenbits.xen.org/xsa/advisory-180.html
https://libvirt.org/git/?p=libvirt.git;a=commit;h=0d968ad715475a1660779bcdd2c5b38ad63db4cf
Source: MITRE
Published: 2016-05-25
Updated: 2017-09-08
Type: CWE-400
Base Score: 2.1
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 3.9
Severity: LOW
Base Score: 6.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Impact Score: 4
Exploitability Score: 2
Severity: MEDIUM