CVE-2013-4154: Red Hat Libvirt

Medium severity, CVSS 4.3. EPSS: 2.2% chance of exploitation in the next 30 days.

The qemuAgentCommand function in libvirt before 1.1.1, when a guest agent is not configured, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to "agent based cpu (un)plug," as demonstrated by the "virsh vcpucount foobar --guest" command.

Affected products

• Red Hat Libvirt: up to and including 1.1.0; version 1.0.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …

Published 2013-09-30. Last modified 2026-06-16.