CVE-2014-3633: Canonical Ubuntu Linux

Medium severity, CVSS 5.8. EPSS: 2.8% chance of exploitation in the next 30 days.

The qemuDomainGetBlockIoTune function in qemu/qemu_driver.c in libvirt before 1.2.9, when a disk has been hot-plugged or removed from the live image, allows remote attackers to cause a denial of service (crash) or read sensitive heap information via a crafted blkiotune query, which triggers an out-of-bounds read.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 12.04 only; version 14.04 only
• Libvirt Libvirt: up to and including 1.2.8; version 1.2.0 only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.4 only; …

Published 2014-10-06. Last modified 2026-06-17.