CVE-2017-2615: Citrix Xenserver

Critical severity, CVSS 9.1. EPSS: 3.6% chance of exploitation in the next 30 days.

Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host.

Affected products

• Citrix Xenserver: version 6.0.2 only; version 6.2.0 only; version 6.5 only; version 7.0 only; version 7.1 only
• Debian Debian Linux: version 7.0 only
• Qemu Qemu: up to and including 2.8.0
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.4 only
• Red Hat Enterprise Linux Server Eus: version 7.3 only; version 7.4 only; version 7.5 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
• Red Hat Openstack: version 5.0 only; version 6.0 only; version 7.0 only; version 8 only; version 9 only; version 10 only
• Xen Xen: up to and including 4.7.1; version 4.7.1 only

Published 2018-07-03. Last modified 2026-06-17.