CVE-2020-14364: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 5.4% chance of exploitation in the next 30 days.

An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 20.04 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 31 only; version 32 only
• Opensuse Leap: version 15.2 only
• Qemu Qemu: before 5.2.0 (fixed in 5.2.0)
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only
• Red Hat Openstack: version 10 only; version 13 only

Published 2020-08-31. Last modified 2026-06-17.