CVE-2015-6855: Arista Eos

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

hw/ide/core.c in QEMU does not properly restrict the commands accepted by an ATAPI device, which allows guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash.

Affected products

• Arista Eos: affected versions not specified
• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.04 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Fedoraproject Fedora: version 21 only; version 22 only; version 23 only
• Qemu Qemu: up to and including 2.4.1
• Suse Linux Enterprise Desktop: version 12 only
• Suse Linux Enterprise Server: version 12 only

Published 2015-11-06. Last modified 2026-06-17.